87099818 has 32 divisors (see below), whose sum is σ = 147692160. Its totient is φ = 38243520.

The previous prime is 87099809. The next prime is 87099821. The reversal of 87099818 is 81899078.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52721 + ... + 54347.

It is an arithmetic number, because the mean of its divisors is an integer number (4615380).

Almost surely, 2^87099818 is an apocalyptic number.

87099818 is a deficient number, since it is larger than the sum of its proper divisors (60592342).

87099818 is a wasteful number, since it uses less digits than its factorization.

87099818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742.

The product of its (nonzero) digits is 290304, while the sum is 50.

The square root of 87099818 is about 9332.7283256291. The cubic root of 87099818 is about 443.2741603551.

The spelling of 87099818 in words is "eighty-seven million, ninety-nine thousand, eight hundred eighteen".