131319979 has 8 divisors (see below), whose sum is σ = 153570560. Its totient is φ = 109942056.

The previous prime is 131319977. The next prime is 131319983. The reversal of 131319979 is 979913131.

It is a happy number.

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

It is not a de Polignac number, because 131319979 - 2¹ = 131319977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131319971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217839 + ... + 218440.

It is an arithmetic number, because the mean of its divisors is an integer number (19196320).

Almost surely, 2^131319979 is an apocalyptic number.

131319979 is a deficient number, since it is larger than the sum of its proper divisors (22250581).

131319979 is an equidigital number, since it uses as much as digits as its factorization.

131319979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436329.

The product of its digits is 45927, while the sum is 43.

The square root of 131319979 is about 11459.4929643506. The cubic root of 131319979 is about 508.2884815992.

The spelling of 131319979 in words is "one hundred thirty-one million, three hundred nineteen thousand, nine hundred seventy-nine".