319121172 has 18 divisors (see below), whose sum is σ = 806667498. Its totient is φ = 106373712.

The previous prime is 319121111. The next prime is 319121177. The reversal of 319121172 is 271121913.

It can be written as a sum of positive squares in only one way, i.e., 317766276 + 1354896 = 17826^2 + 1164^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319121177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4432203 + ... + 4432274.

It is an arithmetic number, because the mean of its divisors is an integer number (44814861).

Almost surely, 2^319121172 is an apocalyptic number.

It is an amenable number.

319121172 is an abundant number, since it is smaller than the sum of its proper divisors (487546326).

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

319121172 is a wasteful number, since it uses less digits than its factorization.

319121172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864487 (or 8864482 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 319121172 is about 17863.9629421917. The cubic root of 319121172 is about 683.3636484403.

The spelling of 319121172 in words is "three hundred nineteen million, one hundred twenty-one thousand, one hundred seventy-two".