319357949 has 2 divisors, whose sum is σ = 319357950. Its totient is φ = 319357948.

The previous prime is 319357943. The next prime is 319357963. The reversal of 319357949 is 949753913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228765625 + 90592324 = 15125^2 + 9518^2 .

It is a cyclic number.

It is not a de Polignac number, because 319357949 - 2²⁸ = 50922493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 319357897 and 319357906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319357943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159678974 + 159678975.

It is an arithmetic number, because the mean of its divisors is an integer number (159678975).

Almost surely, 2^319357949 is an apocalyptic number.

It is an amenable number.

319357949 is a deficient number, since it is larger than the sum of its proper divisors (1).

319357949 is an equidigital number, since it uses as much as digits as its factorization.

319357949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 50.

The square root of 319357949 is about 17870.5889382527. The cubic root of 319357949 is about 683.5326174792.

The spelling of 319357949 in words is "three hundred nineteen million, three hundred fifty-seven thousand, nine hundred forty-nine".