319779945 has 72 divisors (see below), whose sum is σ = 599224704. Its totient is φ = 157690368.

The previous prime is 319779923. The next prime is 319779959. The reversal of 319779945 is 549977913.

It is a happy number.

It is not a de Polignac number, because 319779945 - 2⁸ = 319779689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 319779891 and 319779900.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 871152 + ... + 871518.

Almost surely, 2^319779945 is an apocalyptic number.

It is an amenable number.

319779945 is a deficient number, since it is larger than the sum of its proper divisors (279444759).

319779945 is a wasteful number, since it uses less digits than its factorization.

319779945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 459 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 319779945 is about 17882.3920379797. The cubic root of 319779945 is about 683.8335557355.

The spelling of 319779945 in words is "three hundred nineteen million, seven hundred seventy-nine thousand, nine hundred forty-five".