131399979943 has 2 divisors, whose sum is σ = 131399979944. Its totient is φ = 131399979942.

The previous prime is 131399979913. The next prime is 131399979959. The reversal of 131399979943 is 349979993131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131399979943 - 2²⁵ = 131366425511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131399979913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65699989971 + 65699989972.

It is an arithmetic number, because the mean of its divisors is an integer number (65699989972).

Almost surely, 2^131399979943 is an apocalyptic number.

131399979943 is a deficient number, since it is larger than the sum of its proper divisors (1).

131399979943 is an equidigital number, since it uses as much as digits as its factorization.

131399979943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44641044, while the sum is 67.

The spelling of 131399979943 in words is "one hundred thirty-one billion, three hundred ninety-nine million, nine hundred seventy-nine thousand, nine hundred forty-three".