319393913 has 2 divisors, whose sum is σ = 319393914. Its totient is φ = 319393912.

The previous prime is 319393903. The next prime is 319393927.

319393913 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285846649 + 33547264 = 16907^2 + 5792^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 319393913 - 2¹² = 319389817 is a prime.

It is a super-2 number, since 2×319393913² = 204024943322903138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (319393903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159696956 + 159696957.

It is an arithmetic number, because the mean of its divisors is an integer number (159696957).

Almost surely, 2^319393913 is an apocalyptic number.

It is an amenable number.

319393913 is a deficient number, since it is larger than the sum of its proper divisors (1).

319393913 is an equidigital number, since it uses as much as digits as its factorization.

319393913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59049, while the sum is 41.

The square root of 319393913 is about 17871.5951442506. The cubic root of 319393913 is about 683.5582748379.

The spelling of 319393913 in words is "three hundred nineteen million, three hundred ninety-three thousand, nine hundred thirteen".