131678979 has 16 divisors (see below), whose sum is σ = 189118464. Its totient is φ = 81259200.

The previous prime is 131678969. The next prime is 131678983. The reversal of 131678979 is 979876131.

It is not a de Polignac number, because 131678979 - 2⁹ = 131678467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131678959) 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 15 ways as a sum of consecutive naturals, for example, 28642 + ... + 32919.

It is an arithmetic number, because the mean of its divisors is an integer number (11819904).

Almost surely, 2^131678979 is an apocalyptic number.

131678979 is a deficient number, since it is larger than the sum of its proper divisors (57439485).

131678979 is a wasteful number, since it uses less digits than its factorization.

131678979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61618.

The product of its digits is 571536, while the sum is 51.

The square root of 131678979 is about 11475.1461428602. The cubic root of 131678979 is about 508.7512432080.

The spelling of 131678979 in words is "one hundred thirty-one million, six hundred seventy-eight thousand, nine hundred seventy-nine".