164857213 has 2 divisors, whose sum is σ = 164857214. Its totient is φ = 164857212.

The previous prime is 164857207. The next prime is 164857229. The reversal of 164857213 is 312758461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164788569 + 68644 = 12837^2 + 262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164857213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164857013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82428606 + 82428607.

It is an arithmetic number, because the mean of its divisors is an integer number (82428607).

Almost surely, 2^164857213 is an apocalyptic number.

It is an amenable number.

164857213 is a deficient number, since it is larger than the sum of its proper divisors (1).

164857213 is an equidigital number, since it uses as much as digits as its factorization.

164857213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 164857213 is about 12839.6733992731. The cubic root of 164857213 is about 548.3223956290.

The spelling of 164857213 in words is "one hundred sixty-four million, eight hundred fifty-seven thousand, two hundred thirteen".