131712239 has 2 divisors, whose sum is σ = 131712240. Its totient is φ = 131712238.

The previous prime is 131712227. The next prime is 131712253. The reversal of 131712239 is 932217131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131712239 is a prime.

It is a super-2 number, since 2×131712239² = 34696227804786242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131712289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65856119 + 65856120.

It is an arithmetic number, because the mean of its divisors is an integer number (65856120).

Almost surely, 2^131712239 is an apocalyptic number.

131712239 is a deficient number, since it is larger than the sum of its proper divisors (1).

131712239 is an equidigital number, since it uses as much as digits as its factorization.

131712239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 131712239 is about 11476.5952703753. The cubic root of 131712239 is about 508.7940737393.

The spelling of 131712239 in words is "one hundred thirty-one million, seven hundred twelve thousand, two hundred thirty-nine".