517701985 has 8 divisors (see below), whose sum is σ = 621948096. Its totient is φ = 413691120.

The previous prime is 517701971. The next prime is 517701991. The reversal of 517701985 is 589107715.

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

It is not a de Polignac number, because 517701985 - 2⁷ = 517701857 is a prime.

It is a Duffinian 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, 53931 + ... + 62800.

It is an arithmetic number, because the mean of its divisors is an integer number (77743512).

Almost surely, 2^517701985 is an apocalyptic number.

It is an amenable number.

517701985 is a deficient number, since it is larger than the sum of its proper divisors (104246111).

517701985 is a wasteful number, since it uses less digits than its factorization.

517701985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117623.

The product of its (nonzero) digits is 88200, while the sum is 43.

The square root of 517701985 is about 22753.0653978755. The cubic root of 517701985 is about 802.9588270409.

The spelling of 517701985 in words is "five hundred seventeen million, seven hundred one thousand, nine hundred eighty-five".