131779172 has 24 divisors (see below), whose sum is σ = 279062784. Its totient is φ = 53154432.

The previous prime is 131779159. The next prime is 131779177. The reversal of 131779172 is 271977131.

It is not an unprimeable number, because it can be changed into a prime (131779177) 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, 137948 + ... + 138899.

It is an arithmetic number, because the mean of its divisors is an integer number (11627616).

Almost surely, 2^131779172 is an apocalyptic number.

It is an amenable number.

131779172 is an abundant number, since it is smaller than the sum of its proper divisors (147283612).

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

131779172 is a wasteful number, since it uses less digits than its factorization.

131779172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276875 (or 276873 counting only the distinct ones).

The product of its digits is 18522, while the sum is 38.

The square root of 131779172 is about 11479.5109651936. The cubic root of 131779172 is about 508.8802447916.

The spelling of 131779172 in words is "one hundred thirty-one million, seven hundred seventy-nine thousand, one hundred seventy-two".