164355931 has 2 divisors, whose sum is σ = 164355932. Its totient is φ = 164355930.

The previous prime is 164355913. The next prime is 164355973. The reversal of 164355931 is 139553461.

It is a happy number.

Together with previous prime (164355913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164355931 - 2¹⁷ = 164224859 is a prime.

It is a super-2 number, since 2×164355931² = 54025744109753522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164355991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82177965 + 82177966.

It is an arithmetic number, because the mean of its divisors is an integer number (82177966).

Almost surely, 2^164355931 is an apocalyptic number.

164355931 is a deficient number, since it is larger than the sum of its proper divisors (1).

164355931 is an equidigital number, since it uses as much as digits as its factorization.

164355931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 37.

The square root of 164355931 is about 12820.1377137689. The cubic root of 164355931 is about 547.7660693245.

It can be divided in two parts, 16435 and 5931, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 164355931 in words is "one hundred sixty-four million, three hundred fifty-five thousand, nine hundred thirty-one".