27131239 has 2 divisors, whose sum is σ = 27131240. Its totient is φ = 27131238.

The previous prime is 27131213. The next prime is 27131263. The reversal of 27131239 is 93213172.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27131239 is a prime.

It is a super-2 number, since 2×27131239² = 1472208259350242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27131339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13565619 + 13565620.

It is an arithmetic number, because the mean of its divisors is an integer number (13565620).

Almost surely, 2^27131239 is an apocalyptic number.

27131239 is a deficient number, since it is larger than the sum of its proper divisors (1).

27131239 is an equidigital number, since it uses as much as digits as its factorization.

27131239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 27131239 is about 5208.7655927292. The cubic root of 27131239 is about 300.4852849422.

It can be divided in two parts, 27 and 131239, that multiplied together give a palindrome (3543453).

The spelling of 27131239 in words is "twenty-seven million, one hundred thirty-one thousand, two hundred thirty-nine".