27393931 has 2 divisors, whose sum is σ = 27393932. Its totient is φ = 27393930.

The previous prime is 27393923. The next prime is 27393973. The reversal of 27393931 is 13939372.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27393931 - 2³ = 27393923 is a prime.

It is a super-2 number, since 2×27393931² = 1500854911265522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27393631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13696965 + 13696966.

It is an arithmetic number, because the mean of its divisors is an integer number (13696966).

Almost surely, 2^27393931 is an apocalyptic number.

27393931 is a deficient number, since it is larger than the sum of its proper divisors (1).

27393931 is an equidigital number, since it uses as much as digits as its factorization.

27393931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 37.

The square root of 27393931 is about 5233.9211877903. The cubic root of 27393931 is about 301.4519650251.

It can be divided in two parts, 2739 and 3931, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 27393931 in words is "twenty-seven million, three hundred ninety-three thousand, nine hundred thirty-one".