319042513 has 2 divisors, whose sum is σ = 319042514. Its totient is φ = 319042512.

The previous prime is 319042511. The next prime is 319042517. The reversal of 319042513 is 315240913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234916929 + 84125584 = 15327^2 + 9172^2 .

It is a cyclic number.

It is not a de Polignac number, because 319042513 - 2¹ = 319042511 is a prime.

Together with 319042511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (319042511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159521256 + 159521257.

It is an arithmetic number, because the mean of its divisors is an integer number (159521257).

Almost surely, 2^319042513 is an apocalyptic number.

It is an amenable number.

319042513 is a deficient number, since it is larger than the sum of its proper divisors (1).

319042513 is an equidigital number, since it uses as much as digits as its factorization.

319042513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 319042513 is about 17861.7611953581. The cubic root of 319042513 is about 683.3074972319.

The spelling of 319042513 in words is "three hundred nineteen million, forty-two thousand, five hundred thirteen".