131399979 has 8 divisors (see below), whose sum is σ = 180851712. Its totient is φ = 84774120.

The previous prime is 131399977. The next prime is 131399981. The reversal of 131399979 is 979993131.

It is an interprime number because it is at equal distance from previous prime (131399977) and next prime (131399981).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131399979 - 2¹ = 131399977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131399977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706359 + ... + 706544.

It is an arithmetic number, because the mean of its divisors is an integer number (22606464).

Almost surely, 2^131399979 is an apocalyptic number.

131399979 is a deficient number, since it is larger than the sum of its proper divisors (49451733).

131399979 is a wasteful number, since it uses less digits than its factorization.

131399979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412937.

The product of its digits is 413343, while the sum is 51.

The square root of 131399979 is about 11462.9829887338. The cubic root of 131399979 is about 508.3916769249.

The spelling of 131399979 in words is "one hundred thirty-one million, three hundred ninety-nine thousand, nine hundred seventy-nine".