27131197 has 2 divisors, whose sum is σ = 27131198. Its totient is φ = 27131196.

The previous prime is 27131189. The next prime is 27131213. The reversal of 27131197 is 79113172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18957316 + 8173881 = 4354^2 + 2859^2 .

It is a cyclic number.

It is not a de Polignac number, because 27131197 - 2³ = 27131189 is a prime.

It is a super-2 number, since 2×27131197² = 1472203701305618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27131597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13565598 + 13565599.

It is an arithmetic number, because the mean of its divisors is an integer number (13565599).

Almost surely, 2^27131197 is an apocalyptic number.

It is an amenable number.

27131197 is a deficient number, since it is larger than the sum of its proper divisors (1).

27131197 is an equidigital number, since it uses as much as digits as its factorization.

27131197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 31.

The square root of 27131197 is about 5208.7615610623. The cubic root of 27131197 is about 300.4851298886.

The spelling of 27131197 in words is "twenty-seven million, one hundred thirty-one thousand, one hundred ninety-seven".