87995999 has 16 divisors (see below), whose sum is σ = 113014272. Its totient is φ = 66594528.

The previous prime is 87995989. The next prime is 87996031. The reversal of 87995999 is 99959978.

It is a de Polignac number, because none of the positive numbers 2^k-87995999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87995989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18929 + ... + 23114.

It is an arithmetic number, because the mean of its divisors is an integer number (7063392).

Almost surely, 2^87995999 is an apocalyptic number.

87995999 is a deficient number, since it is larger than the sum of its proper divisors (25018273).

87995999 is a wasteful number, since it uses less digits than its factorization.

87995999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42086.

The product of its digits is 16533720, while the sum is 65.

The square root of 87995999 is about 9380.6182632063. The cubic root of 87995999 is about 444.7892769933.

The spelling of 87995999 in words is "eighty-seven million, nine hundred ninety-five thousand, nine hundred ninety-nine".