164644313 has 2 divisors, whose sum is σ = 164644314. Its totient is φ = 164644312.

The previous prime is 164644309. The next prime is 164644349. The reversal of 164644313 is 313446461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127531849 + 37112464 = 11293^2 + 6092^2 .

It is a cyclic number.

It is not a de Polignac number, because 164644313 - 2² = 164644309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164644313.

It is not a weakly prime, because it can be changed into another prime (164649313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82322156 + 82322157.

It is an arithmetic number, because the mean of its divisors is an integer number (82322157).

Almost surely, 2^164644313 is an apocalyptic number.

It is an amenable number.

164644313 is a deficient number, since it is larger than the sum of its proper divisors (1).

164644313 is an equidigital number, since it uses as much as digits as its factorization.

164644313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 32.

The square root of 164644313 is about 12831.3800115186. The cubic root of 164644313 is about 548.0862556697.

The spelling of 164644313 in words is "one hundred sixty-four million, six hundred forty-four thousand, three hundred thirteen".