164671931 has 4 divisors (see below), whose sum is σ = 164736432. Its totient is φ = 164607432.

The previous prime is 164671921. The next prime is 164671937. The reversal of 164671931 is 139176461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139176461 = 1571 ⋅88591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164671931 is a prime.

It is a super-2 number, since 2×164671931² = 54233689718537522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164671937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28256 + ... + 33581.

It is an arithmetic number, because the mean of its divisors is an integer number (41184108).

Almost surely, 2^164671931 is an apocalyptic number.

164671931 is a deficient number, since it is larger than the sum of its proper divisors (64501).

164671931 is an equidigital number, since it uses as much as digits as its factorization.

164671931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64500.

The product of its digits is 27216, while the sum is 38.

The square root of 164671931 is about 12832.4561561690. The cubic root of 164671931 is about 548.1168999105.

The spelling of 164671931 in words is "one hundred sixty-four million, six hundred seventy-one thousand, nine hundred thirty-one".