87870637 has 4 divisors (see below), whose sum is σ = 93039516. Its totient is φ = 82701760.

The previous prime is 87870631. The next prime is 87870641. The reversal of 87870637 is 73607878.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73607878 = 2 ⋅36803939.

It can be written as a sum of positive squares in 2 ways, for example, as 63457156 + 24413481 = 7966^2 + 4941^2 .

It is a cyclic number.

It is not a de Polignac number, because 87870637 - 2⁷ = 87870509 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 (87870631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2584414 + ... + 2584447.

It is an arithmetic number, because the mean of its divisors is an integer number (23259879).

Almost surely, 2^87870637 is an apocalyptic number.

It is an amenable number.

87870637 is a deficient number, since it is larger than the sum of its proper divisors (5168879).

87870637 is a wasteful number, since it uses less digits than its factorization.

87870637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168878.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 87870637 is about 9373.9339127178. The cubic root of 87870637 is about 444.5779561227.

The spelling of 87870637 in words is "eighty-seven million, eight hundred seventy thousand, six hundred thirty-seven".