87831317 has 8 divisors (see below), whose sum is σ = 101373312. Its totient is φ = 74538000.

The previous prime is 87831311. The next prime is 87831379. The reversal of 87831317 is 71313878.

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

It is not a de Polignac number, because 87831317 - 2⁴ = 87831301 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 (87831311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61409 + ... + 62822.

It is an arithmetic number, because the mean of its divisors is an integer number (12671664).

Almost surely, 2^87831317 is an apocalyptic number.

It is an amenable number.

87831317 is a deficient number, since it is larger than the sum of its proper divisors (13541995).

87831317 is a wasteful number, since it uses less digits than its factorization.

87831317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124339.

The product of its digits is 28224, while the sum is 38.

The square root of 87831317 is about 9371.8363728780. The cubic root of 87831317 is about 444.5116335759.

The spelling of 87831317 in words is "eighty-seven million, eight hundred thirty-one thousand, three hundred seventeen".