87991202 has 12 divisors (see below), whose sum is σ = 142921170. Its totient is φ = 40611168.

The previous prime is 87991199. The next prime is 87991213. The reversal of 87991202 is 20219978.

It can be written as a sum of positive squares in 3 ways, for example, as 48288601 + 39702601 = 6949^2 + 6301^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129827 + ... + 130502.

Almost surely, 2^87991202 is an apocalyptic number.

87991202 is a deficient number, since it is larger than the sum of its proper divisors (54929968).

87991202 is a wasteful number, since it uses less digits than its factorization.

87991202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260357 (or 260344 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 87991202 is about 9380.3625729499. The cubic root of 87991202 is about 444.7811944556.

It can be divided in two parts, 8799 and 1202, that added together give a palindrome (10001).

The spelling of 87991202 in words is "eighty-seven million, nine hundred ninety-one thousand, two hundred two".