164728931 has 2 divisors, whose sum is σ = 164728932. Its totient is φ = 164728930.

The previous prime is 164728919. The next prime is 164728951. The reversal of 164728931 is 139827461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164728931 - 2¹⁰ = 164727907 is a prime.

It is a super-2 number, since 2×164728931² = 54271241416805522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164728901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82364465 + 82364466.

It is an arithmetic number, because the mean of its divisors is an integer number (82364466).

Almost surely, 2^164728931 is an apocalyptic number.

164728931 is a deficient number, since it is larger than the sum of its proper divisors (1).

164728931 is an equidigital number, since it uses as much as digits as its factorization.

164728931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 164728931 is about 12834.6768950371. The cubic root of 164728931 is about 548.1801348508.

The spelling of 164728931 in words is "one hundred sixty-four million, seven hundred twenty-eight thousand, nine hundred thirty-one".