164040931 has 4 divisors (see below), whose sum is σ = 164247552. Its totient is φ = 163834312.

The previous prime is 164040917. The next prime is 164040937. The reversal of 164040931 is 139040461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164040931 - 2¹⁷ = 163909859 is a prime.

It is a super-2 number, since 2×164040931² = 53818854086693522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164040931.

It is not an unprimeable number, because it can be changed into a prime (164040937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102115 + ... + 103708.

It is an arithmetic number, because the mean of its divisors is an integer number (41061888).

Almost surely, 2^164040931 is an apocalyptic number.

164040931 is a deficient number, since it is larger than the sum of its proper divisors (206621).

164040931 is an equidigital number, since it uses as much as digits as its factorization.

164040931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206620.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 164040931 is about 12807.8464622278. The cubic root of 164040931 is about 547.4159011239.

The spelling of 164040931 in words is "one hundred sixty-four million, forty thousand, nine hundred thirty-one".