131495979 has 16 divisors (see below), whose sum is σ = 189060480. Its totient is φ = 81023040.

The previous prime is 131495977. The next prime is 131495999. The reversal of 131495979 is 979594131.

It is not a de Polignac number, because 131495979 - 2¹ = 131495977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131495977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25797 + ... + 30470.

It is an arithmetic number, because the mean of its divisors is an integer number (11816280).

Almost surely, 2^131495979 is an apocalyptic number.

131495979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

131495979 is a deficient number, since it is larger than the sum of its proper divisors (57564501).

131495979 is a wasteful number, since it uses less digits than its factorization.

131495979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56330.

The product of its digits is 306180, while the sum is 48.

The square root of 131495979 is about 11467.1696159078. The cubic root of 131495979 is about 508.5154560419.

The spelling of 131495979 in words is "one hundred thirty-one million, four hundred ninety-five thousand, nine hundred seventy-nine".