319489957 has 4 divisors (see below), whose sum is σ = 326920000. Its totient is φ = 312059916.

The previous prime is 319489949. The next prime is 319490021. The reversal of 319489957 is 759984913.

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, and also an emirpimes, since its reverse is a distinct semiprime: 759984913 = 4231 ⋅179623.

It is a cyclic number.

It is not a de Polignac number, because 319489957 - 2³ = 319489949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 319489898 and 319489907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319489657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3714957 + ... + 3715042.

It is an arithmetic number, because the mean of its divisors is an integer number (81730000).

Almost surely, 2^319489957 is an apocalyptic number.

It is an amenable number.

319489957 is a deficient number, since it is larger than the sum of its proper divisors (7430043).

319489957 is an equidigital number, since it uses as much as digits as its factorization.

319489957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430042.

The product of its digits is 2449440, while the sum is 55.

The square root of 319489957 is about 17874.2819995657. The cubic root of 319489957 is about 683.6267849010.

It can be divided in two parts, 31948 and 9957, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 319489957 in words is "three hundred nineteen million, four hundred eighty-nine thousand, nine hundred fifty-seven".