319097813 has 2 divisors, whose sum is σ = 319097814. Its totient is φ = 319097812.

The previous prime is 319097809. The next prime is 319097833. The reversal of 319097813 is 318790913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179077924 + 140019889 = 13382^2 + 11833^2 .

It is a cyclic number.

It is not a de Polignac number, because 319097813 - 2² = 319097809 is a prime.

It is a super-2 number, since 2×319097813² = 203646828522765938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319097833) 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 as a sum of consecutive naturals, namely, 159548906 + 159548907.

It is an arithmetic number, because the mean of its divisors is an integer number (159548907).

Almost surely, 2^319097813 is an apocalyptic number.

It is an amenable number.

319097813 is a deficient number, since it is larger than the sum of its proper divisors (1).

319097813 is an equidigital number, since it uses as much as digits as its factorization.

319097813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 319097813 is about 17863.3091279304. The cubic root of 319097813 is about 683.3469744385.

The spelling of 319097813 in words is "three hundred nineteen million, ninety-seven thousand, eight hundred thirteen".