27388931 has 2 divisors, whose sum is σ = 27388932. Its totient is φ = 27388930.

The previous prime is 27388919. The next prime is 27388951. The reversal of 27388931 is 13988372.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27388931 - 2¹⁰ = 27387907 is a prime.

It is a super-2 number, since 2×27388931² = 1500307082645522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27388951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13694465 + 13694466.

It is an arithmetic number, because the mean of its divisors is an integer number (13694466).

Almost surely, 2^27388931 is an apocalyptic number.

27388931 is a deficient number, since it is larger than the sum of its proper divisors (1).

27388931 is an equidigital number, since it uses as much as digits as its factorization.

27388931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 27388931 is about 5233.4435126406. The cubic root of 27388931 is about 301.4336233525.

The spelling of 27388931 in words is "twenty-seven million, three hundred eighty-eight thousand, nine hundred thirty-one".