131312939 has 2 divisors, whose sum is σ = 131312940. Its totient is φ = 131312938.

The previous prime is 131312903. The next prime is 131312941. The reversal of 131312939 is 939213131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131312939 - 2²⁰ = 130264363 is a prime.

It is a Sophie Germain prime.

Together with 131312941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131312969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65656469 + 65656470.

It is an arithmetic number, because the mean of its divisors is an integer number (65656470).

Almost surely, 2^131312939 is an apocalyptic number.

131312939 is a deficient number, since it is larger than the sum of its proper divisors (1).

131312939 is an equidigital number, since it uses as much as digits as its factorization.

131312939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 32.

The square root of 131312939 is about 11459.1857913204. The cubic root of 131312939 is about 508.2793984044.

The spelling of 131312939 in words is "one hundred thirty-one million, three hundred twelve thousand, nine hundred thirty-nine".