87685617 has 16 divisors (see below), whose sum is σ = 118490112. Its totient is φ = 57674880.

The previous prime is 87685613. The next prime is 87685621. The reversal of 87685617 is 71658678.

It is an interprime number because it is at equal distance from previous prime (87685613) and next prime (87685621).

It is not a de Polignac number, because 87685617 - 2² = 87685613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87685613) 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, 77943 + ... + 79059.

It is an arithmetic number, because the mean of its divisors is an integer number (7405632).

Almost surely, 2^87685617 is an apocalyptic number.

It is an amenable number.

87685617 is a deficient number, since it is larger than the sum of its proper divisors (30804495).

87685617 is a wasteful number, since it uses less digits than its factorization.

87685617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its digits is 564480, while the sum is 48.

The square root of 87685617 is about 9364.0598567075. The cubic root of 87685617 is about 444.2657031094.

The spelling of 87685617 in words is "eighty-seven million, six hundred eighty-five thousand, six hundred seventeen".