131256679 has 2 divisors, whose sum is σ = 131256680. Its totient is φ = 131256678.

The previous prime is 131256661. The next prime is 131256691. The reversal of 131256679 is 976652131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131256679 is a 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 (131256379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65628339 + 65628340.

It is an arithmetic number, because the mean of its divisors is an integer number (65628340).

Almost surely, 2^131256679 is an apocalyptic number.

131256679 is a deficient number, since it is larger than the sum of its proper divisors (1).

131256679 is an equidigital number, since it uses as much as digits as its factorization.

131256679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 131256679 is about 11456.7307291391. The cubic root of 131256679 is about 508.2067985930.

The spelling of 131256679 in words is "one hundred thirty-one million, two hundred fifty-six thousand, six hundred seventy-nine".