87636685 has 4 divisors (see below), whose sum is σ = 105164028. Its totient is φ = 70109344.

The previous prime is 87636677. The next prime is 87636691. The reversal of 87636685 is 58663678.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58767556 + 28869129 = 7666^2 + 5373^2 .

It is a cyclic number.

It is not a de Polignac number, because 87636685 - 2³ = 87636677 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 3 ways as a sum of consecutive naturals, for example, 8763664 + ... + 8763673.

It is an arithmetic number, because the mean of its divisors is an integer number (26291007).

Almost surely, 2^87636685 is an apocalyptic number.

It is an amenable number.

87636685 is a deficient number, since it is larger than the sum of its proper divisors (17527343).

87636685 is a wasteful number, since it uses less digits than its factorization.

87636685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17527342.

The product of its digits is 1451520, while the sum is 49.

The square root of 87636685 is about 9361.4467364826. The cubic root of 87636685 is about 444.1830485263.

The spelling of 87636685 in words is "eighty-seven million, six hundred thirty-six thousand, six hundred eighty-five".