87118557 has 8 divisors (see below), whose sum is σ = 122990976. Its totient is φ = 54662592.

The previous prime is 87118547. The next prime is 87118561. The reversal of 87118557 is 75581178.

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

It is not a de Polignac number, because 87118557 - 2⁴ = 87118541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87118517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854053 + ... + 854154.

It is an arithmetic number, because the mean of its divisors is an integer number (15373872).

Almost surely, 2^87118557 is an apocalyptic number.

It is an amenable number.

87118557 is a deficient number, since it is larger than the sum of its proper divisors (35872419).

87118557 is a wasteful number, since it uses less digits than its factorization.

87118557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708227.

The product of its digits is 78400, while the sum is 42.

The square root of 87118557 is about 9333.7322117147. The cubic root of 87118557 is about 443.3059473287.

The spelling of 87118557 in words is "eighty-seven million, one hundred eighteen thousand, five hundred fifty-seven".