513307396817 has 2 divisors, whose sum is σ = 513307396818. Its totient is φ = 513307396816.

The previous prime is 513307396807. The next prime is 513307396841. The reversal of 513307396817 is 718693703315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445374708496 + 67932688321 = 667364^2 + 260639^2 .

It is a cyclic number.

It is not a de Polignac number, because 513307396817 - 2²⁴ = 513290619601 is a prime.

It is not a weakly prime, because it can be changed into another prime (513307396807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256653698408 + 256653698409.

It is an arithmetic number, because the mean of its divisors is an integer number (256653698409).

Almost surely, 2^513307396817 is an apocalyptic number.

It is an amenable number.

513307396817 is a deficient number, since it is larger than the sum of its proper divisors (1).

513307396817 is an equidigital number, since it uses as much as digits as its factorization.

513307396817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 513307396817 in words is "five hundred thirteen billion, three hundred seven million, three hundred ninety-six thousand, eight hundred seventeen".