131637979 has 8 divisors (see below), whose sum is σ = 144138240. Its totient is φ = 119226600.

The previous prime is 131637977. The next prime is 131637991. The reversal of 131637979 is 979736131.

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 131637979 - 2¹ = 131637977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131637977) 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, 19099 + ... + 25060.

It is an arithmetic number, because the mean of its divisors is an integer number (18017280).

Almost surely, 2^131637979 is an apocalyptic number.

131637979 is a deficient number, since it is larger than the sum of its proper divisors (12500261).

131637979 is a wasteful number, since it uses less digits than its factorization.

131637979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44441.

The product of its digits is 214326, while the sum is 46.

The square root of 131637979 is about 11473.3595341556. The cubic root of 131637979 is about 508.6984355734.

The spelling of 131637979 in words is "one hundred thirty-one million, six hundred thirty-seven thousand, nine hundred seventy-nine".