131173979 has 8 divisors (see below), whose sum is σ = 132623040. Its totient is φ = 129729600.

The previous prime is 131173969. The next prime is 131173997. The reversal of 131173979 is 979371131.

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

It is a cyclic number.

It is not a de Polignac number, because 131173979 - 2⁸ = 131173723 is a prime.

It is a super-2 number, since 2×131173979² = 34413225533384882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131173909) 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, 98639 + ... + 99959.

It is an arithmetic number, because the mean of its divisors is an integer number (16577880).

Almost surely, 2^131173979 is an apocalyptic number.

131173979 is a deficient number, since it is larger than the sum of its proper divisors (1449061).

131173979 is a wasteful number, since it uses less digits than its factorization.

131173979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341.

The product of its digits is 35721, while the sum is 41.

The square root of 131173979 is about 11453.1209283758. The cubic root of 131173979 is about 508.1000420389.

The spelling of 131173979 in words is "one hundred thirty-one million, one hundred seventy-three thousand, nine hundred seventy-nine".