319999913 has 2 divisors, whose sum is σ = 319999914. Its totient is φ = 319999912.

The previous prime is 319999907. The next prime is 319999931.

319999913 is nontrivially palindromic in base 10.

Together with next prime (319999931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314104729 + 5895184 = 17723^2 + 2428^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319999913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (319999903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159999956 + 159999957.

It is an arithmetic number, because the mean of its divisors is an integer number (159999957).

Almost surely, 2^319999913 is an apocalyptic number.

It is an amenable number.

319999913 is a deficient number, since it is larger than the sum of its proper divisors (1).

319999913 is an equidigital number, since it uses as much as digits as its factorization.

319999913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 531441, while the sum is 53.

The square root of 319999913 is about 17888.5413882742. The cubic root of 319999913 is about 683.9903166840.

The spelling of 319999913 in words is "three hundred nineteen million, nine hundred ninety-nine thousand, nine hundred thirteen".