87557915 has 8 divisors (see below), whose sum is σ = 105124560. Its totient is φ = 70009632.

The previous prime is 87557881. The next prime is 87557927. The reversal of 87557915 is 51975578.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87557915 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87557915.

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, 10301 + ... + 16769.

It is an arithmetic number, because the mean of its divisors is an integer number (13140570).

Almost surely, 2^87557915 is an apocalyptic number.

87557915 is a deficient number, since it is larger than the sum of its proper divisors (17566645).

87557915 is a wasteful number, since it uses less digits than its factorization.

87557915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9181.

The product of its digits is 441000, while the sum is 47.

The square root of 87557915 is about 9357.2386418216. The cubic root of 87557915 is about 444.0499277647.

The spelling of 87557915 in words is "eighty-seven million, five hundred fifty-seven thousand, nine hundred fifteen".