87992915 has 4 divisors (see below), whose sum is σ = 105591504. Its totient is φ = 70394328.

The previous prime is 87992899. The next prime is 87992953. The reversal of 87992915 is 51929978.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87992915 - 2⁴ = 87992899 is a prime.

It is a Duffinian 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, 8799287 + ... + 8799296.

It is an arithmetic number, because the mean of its divisors is an integer number (26397876).

Almost surely, 2^87992915 is an apocalyptic number.

87992915 is a deficient number, since it is larger than the sum of its proper divisors (17598589).

87992915 is a wasteful number, since it uses less digits than its factorization.

87992915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17598588.

The product of its digits is 408240, while the sum is 50.

The square root of 87992915 is about 9380.4538802768. The cubic root of 87992915 is about 444.7840807488.

The spelling of 87992915 in words is "eighty-seven million, nine hundred ninety-two thousand, nine hundred fifteen".