164869931 has 2 divisors, whose sum is σ = 164869932. Its totient is φ = 164869930.

The previous prime is 164869883. The next prime is 164869949. The reversal of 164869931 is 139968461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164869931 - 2⁶ = 164869867 is a prime.

It is a super-2 number, since 2×164869931² = 54364188295889522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164869231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82434965 + 82434966.

It is an arithmetic number, because the mean of its divisors is an integer number (82434966).

Almost surely, 2^164869931 is an apocalyptic number.

164869931 is a deficient number, since it is larger than the sum of its proper divisors (1).

164869931 is an equidigital number, since it uses as much as digits as its factorization.

164869931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 164869931 is about 12840.1686515404. The cubic root of 164869931 is about 548.3364954769.

The spelling of 164869931 in words is "one hundred sixty-four million, eight hundred sixty-nine thousand, nine hundred thirty-one".