319553989 has 4 divisors (see below), whose sum is σ = 336372640. Its totient is φ = 302735340.

The previous prime is 319553963. The next prime is 319554017. The reversal of 319553989 is 989355913.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 319553989 - 2⁵ = 319553957 is a prime.

It is a super-2 number, since 2×319553989² = 204229503771624242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319553909) 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, 8409297 + ... + 8409334.

It is an arithmetic number, because the mean of its divisors is an integer number (84093160).

Almost surely, 2^319553989 is an apocalyptic number.

It is an amenable number.

319553989 is a deficient number, since it is larger than the sum of its proper divisors (16818651).

319553989 is a wasteful number, since it uses less digits than its factorization.

319553989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16818650.

The product of its digits is 1312200, while the sum is 52.

The square root of 319553989 is about 17876.0730866709. The cubic root of 319553989 is about 683.6724525506.

The spelling of 319553989 in words is "three hundred nineteen million, five hundred fifty-three thousand, nine hundred eighty-nine".