517872685 has 16 divisors (see below), whose sum is σ = 679113792. Its totient is φ = 375984000.

The previous prime is 517872671. The next prime is 517872689. The reversal of 517872685 is 586278715.

It is not a de Polignac number, because 517872685 - 2¹¹ = 517870637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517872689) 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, 25222 + ... + 40888.

It is an arithmetic number, because the mean of its divisors is an integer number (42444612).

Almost surely, 2^517872685 is an apocalyptic number.

517872685 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

517872685 is a deficient number, since it is larger than the sum of its proper divisors (161241107).

517872685 is a wasteful number, since it uses less digits than its factorization.

517872685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16284.

The product of its digits is 940800, while the sum is 49.

The square root of 517872685 is about 22756.8162316261. The cubic root of 517872685 is about 803.0470695780.

The spelling of 517872685 in words is "five hundred seventeen million, eight hundred seventy-two thousand, six hundred eighty-five".