364

This number is a composite.

The first two digits of 364 are the product of the first two primes to the power of the first prime, and the last two digits are the first prime to the product of the first two primes, i.e., 36 = (2*3)^2, and 64 = 2^(2*3). [Raffill]

364 = sigma(prime(3)^2 + prime(6)^2 + prime(4)^2). Note that 364 is the smaller of only two numbers with this property. [Firoozbakht]

π(364) = 3*6*4. [Firoozbakht]

phi(364) - π(364) = 3*6*4. [Firoozbakht]