164865731 has 2 divisors, whose sum is σ = 164865732. Its totient is φ = 164865730.

The previous prime is 164865709. The next prime is 164865739. The reversal of 164865731 is 137568461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164865731 is a prime.

It is a super-2 number, since 2×164865731² = 54361418516328722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164865739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82432865 + 82432866.

It is an arithmetic number, because the mean of its divisors is an integer number (82432866).

Almost surely, 2^164865731 is an apocalyptic number.

164865731 is a deficient number, since it is larger than the sum of its proper divisors (1).

164865731 is an equidigital number, since it uses as much as digits as its factorization.

164865731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 164865731 is about 12840.0051012451. The cubic root of 164865731 is about 548.3318392148.

The spelling of 164865731 in words is "one hundred sixty-four million, eight hundred sixty-five thousand, seven hundred thirty-one".