131779968 has 32 divisors (see below), whose sum is σ = 350041560. Its totient is φ = 43926528.

The previous prime is 131779961. The next prime is 131779987. The reversal of 131779968 is 869977131.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 131779968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131779961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171205 + ... + 171972.

Almost surely, 2^131779968 is an apocalyptic number.

It is an amenable number.

131779968 is an abundant number, since it is smaller than the sum of its proper divisors (218261592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131779968 is an equidigital number, since it uses as much as digits as its factorization.

131779968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343194 (or 343182 counting only the distinct ones).

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

The square root of 131779968 is about 11479.5456356077. The cubic root of 131779968 is about 508.8812694043.

The spelling of 131779968 in words is "one hundred thirty-one million, seven hundred seventy-nine thousand, nine hundred sixty-eight".