131256379 has 2 divisors, whose sum is σ = 131256380. Its totient is φ = 131256378.

The previous prime is 131256373. The next prime is 131256397. The reversal of 131256379 is 973652131.

Together with next prime (131256397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131256379 - 2⁵ = 131256347 is a prime.

It is not a weakly prime, because it can be changed into another prime (131256373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65628189 + 65628190.

It is an arithmetic number, because the mean of its divisors is an integer number (65628190).

Almost surely, 2^131256379 is an apocalyptic number.

131256379 is a deficient number, since it is larger than the sum of its proper divisors (1).

131256379 is an equidigital number, since it uses as much as digits as its factorization.

131256379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 37.

The square root of 131256379 is about 11456.7176363913. The cubic root of 131256379 is about 508.2064114072.

The spelling of 131256379 in words is "one hundred thirty-one million, two hundred fifty-six thousand, three hundred seventy-nine".