87136685 has 8 divisors (see below), whose sum is σ = 107114616. Its totient is φ = 68008960.

The previous prime is 87136657. The next prime is 87136697. The reversal of 87136685 is 58663178.

It can be written as a sum of positive squares in 4 ways, for example, as 2735716 + 84400969 = 1654^2 + 9187^2 .

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

It is not a de Polignac number, because 87136685 - 2²⁰ = 86088109 is a prime.

It is a Duffinian number.

It is a congruent 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, 212324 + ... + 212733.

It is an arithmetic number, because the mean of its divisors is an integer number (13389327).

Almost surely, 2^87136685 is an apocalyptic number.

It is an amenable number.

87136685 is a deficient number, since it is larger than the sum of its proper divisors (19977931).

87136685 is a wasteful number, since it uses less digits than its factorization.

87136685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425103.

The product of its digits is 241920, while the sum is 44.

The square root of 87136685 is about 9334.7032625574. The cubic root of 87136685 is about 443.3366935255.

The spelling of 87136685 in words is "eighty-seven million, one hundred thirty-six thousand, six hundred eighty-five".