87981185 has 16 divisors (see below), whose sum is σ = 106920000. Its totient is φ = 69496896.

The previous prime is 87981181. The next prime is 87981199. The reversal of 87981185 is 58118978.

It is a cyclic number.

It is not a de Polignac number, because 87981185 - 2² = 87981181 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87981181) 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, 176066 + ... + 176564.

It is an arithmetic number, because the mean of its divisors is an integer number (6682500).

Almost surely, 2^87981185 is an apocalyptic number.

It is an amenable number.

87981185 is a deficient number, since it is larger than the sum of its proper divisors (18938815).

87981185 is a wasteful number, since it uses less digits than its factorization.

87981185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its digits is 161280, while the sum is 47.

The square root of 87981185 is about 9379.8286231679. The cubic root of 87981185 is about 444.7643157139.

The spelling of 87981185 in words is "eighty-seven million, nine hundred eighty-one thousand, one hundred eighty-five".