87904091 has 16 divisors (see below), whose sum is σ = 100459008. Its totient is φ = 76137600.

The previous prime is 87904087. The next prime is 87904097. The reversal of 87904091 is 19040978.

It is not a de Polignac number, because 87904091 - 2² = 87904087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87904097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84746 + ... + 85776.

It is an arithmetic number, because the mean of its divisors is an integer number (6278688).

Almost surely, 2^87904091 is an apocalyptic number.

87904091 is a deficient number, since it is larger than the sum of its proper divisors (12554917).

87904091 is a wasteful number, since it uses less digits than its factorization.

87904091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402.

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

The square root of 87904091 is about 9375.7181591599. The cubic root of 87904091 is about 444.6343686870.

The spelling of 87904091 in words is "eighty-seven million, nine hundred four thousand, ninety-one".