517170985 has 16 divisors (see below), whose sum is σ = 668482560. Its totient is φ = 382979520.

The previous prime is 517170961. The next prime is 517170989. The reversal of 517170985 is 589071715.

It is not a de Polignac number, because 517170985 - 2²³ = 508782377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (517170989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68970 + ... + 76099.

It is an arithmetic number, because the mean of its divisors is an integer number (41780160).

Almost surely, 2^517170985 is an apocalyptic number.

It is an amenable number.

517170985 is a deficient number, since it is larger than the sum of its proper divisors (151311575).

517170985 is a wasteful number, since it uses less digits than its factorization.

517170985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145128.

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

The square root of 517170985 is about 22741.3936468282. The cubic root of 517170985 is about 802.6842050853.

The spelling of 517170985 in words is "five hundred seventeen million, one hundred seventy thousand, nine hundred eighty-five".