319356945 has 16 divisors (see below), whose sum is σ = 567745920. Its totient is φ = 170323632.

The previous prime is 319356937. The next prime is 319356949. The reversal of 319356945 is 549653913.

It is not a de Polignac number, because 319356945 - 2³ = 319356937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 319356945.

It is not an unprimeable number, because it can be changed into a prime (319356949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1182669 + ... + 1182938.

It is an arithmetic number, because the mean of its divisors is an integer number (35484120).

Almost surely, 2^319356945 is an apocalyptic number.

It is an amenable number.

319356945 is a deficient number, since it is larger than the sum of its proper divisors (248388975).

319356945 is a wasteful number, since it uses less digits than its factorization.

319356945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365621 (or 2365615 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 319356945 is about 17870.5608473825. The cubic root of 319356945 is about 683.5319011801.

The spelling of 319356945 in words is "three hundred nineteen million, three hundred fifty-six thousand, nine hundred forty-five".