513992917 has 2 divisors, whose sum is σ = 513992918. Its totient is φ = 513992916.

The previous prime is 513992903. The next prime is 513992957. The reversal of 513992917 is 719299315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361988676 + 152004241 = 19026^2 + 12329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513992917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513992957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256996458 + 256996459.

It is an arithmetic number, because the mean of its divisors is an integer number (256996459).

Almost surely, 2^513992917 is an apocalyptic number.

It is an amenable number.

513992917 is a deficient number, since it is larger than the sum of its proper divisors (1).

513992917 is an equidigital number, since it uses as much as digits as its factorization.

513992917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 46.

The square root of 513992917 is about 22671.4118881026. The cubic root of 513992917 is about 801.0366337620.

The spelling of 513992917 in words is "five hundred thirteen million, nine hundred ninety-two thousand, nine hundred seventeen".