131312399 has 2 divisors, whose sum is σ = 131312400. Its totient is φ = 131312398.

The previous prime is 131312353. The next prime is 131312413. The reversal of 131312399 is 993213131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131312399 - 2²⁰ = 130263823 is a prime.

It is a super-2 number, since 2×131312399² = 34485892262270402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131314399) 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, 65656199 + 65656200.

It is an arithmetic number, because the mean of its divisors is an integer number (65656200).

Almost surely, 2^131312399 is an apocalyptic number.

131312399 is a deficient number, since it is larger than the sum of its proper divisors (1).

131312399 is an equidigital number, since it uses as much as digits as its factorization.

131312399 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 131312399 is about 11459.1622294128. The cubic root of 131312399 is about 508.2787016686.

The spelling of 131312399 in words is "one hundred thirty-one million, three hundred twelve thousand, three hundred ninety-nine".