517399685 has 8 divisors (see below), whose sum is σ = 677323296. Its totient is φ = 376290640.

The previous prime is 517399639. The next prime is 517399699. The reversal of 517399685 is 586993715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 517399685 - 2¹⁴ = 517383301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4703579 + ... + 4703688.

It is an arithmetic number, because the mean of its divisors is an integer number (84665412).

Almost surely, 2^517399685 is an apocalyptic number.

517399685 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

517399685 is a deficient number, since it is larger than the sum of its proper divisors (159923611).

517399685 is a wasteful number, since it uses less digits than its factorization.

517399685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9407283.

The product of its digits is 2041200, while the sum is 53.

The square root of 517399685 is about 22746.4213668876. The cubic root of 517399685 is about 802.8025069172.

The spelling of 517399685 in words is "five hundred seventeen million, three hundred ninety-nine thousand, six hundred eighty-five".