131310391 has 2 divisors, whose sum is σ = 131310392. Its totient is φ = 131310390.

The previous prime is 131310379. The next prime is 131310437. The reversal of 131310391 is 193013131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131310391 - 2⁵ = 131310359 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 (131310371) 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, 65655195 + 65655196.

It is an arithmetic number, because the mean of its divisors is an integer number (65655196).

Almost surely, 2^131310391 is an apocalyptic number.

131310391 is a deficient number, since it is larger than the sum of its proper divisors (1).

131310391 is an equidigital number, since it uses as much as digits as its factorization.

131310391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 131310391 is about 11459.0746135977. The cubic root of 131310391 is about 508.2761108271.

The spelling of 131310391 in words is "one hundred thirty-one million, three hundred ten thousand, three hundred ninety-one".