517039693 has 2 divisors, whose sum is σ = 517039694. Its totient is φ = 517039692.

The previous prime is 517039687. The next prime is 517039823. The reversal of 517039693 is 396930715.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283652964 + 233386729 = 16842^2 + 15277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-517039693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517039673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258519846 + 258519847.

It is an arithmetic number, because the mean of its divisors is an integer number (258519847).

Almost surely, 2^517039693 is an apocalyptic number.

It is an amenable number.

517039693 is a deficient number, since it is larger than the sum of its proper divisors (1).

517039693 is an equidigital number, since it uses as much as digits as its factorization.

517039693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 517039693 is about 22738.5068331234. The cubic root of 517039693 is about 802.6162746606.

The spelling of 517039693 in words is "five hundred seventeen million, thirty-nine thousand, six hundred ninety-three".