27397939 has 2 divisors, whose sum is σ = 27397940. Its totient is φ = 27397938.

The previous prime is 27397933. The next prime is 27397949. The reversal of 27397939 is 93979372.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27397939 is a prime.

It is a super-2 number, since 2×27397939² = 1501294122895442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27397892 and 27397901.

It is not a weakly prime, because it can be changed into another prime (27397933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13698969 + 13698970.

It is an arithmetic number, because the mean of its divisors is an integer number (13698970).

Almost surely, 2^27397939 is an apocalyptic number.

27397939 is a deficient number, since it is larger than the sum of its proper divisors (1).

27397939 is an equidigital number, since it uses as much as digits as its factorization.

27397939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 49.

The square root of 27397939 is about 5234.3040607133. The cubic root of 27397939 is about 301.4666660983.

The spelling of 27397939 in words is "twenty-seven million, three hundred ninety-seven thousand, nine hundred thirty-nine".