87903891 has 12 divisors (see below), whose sum is σ = 127826400. Its totient is φ = 58208400.

The previous prime is 87903883. The next prime is 87903929. The reversal of 87903891 is 19830978.

It is not a de Polignac number, because 87903891 - 2³ = 87903883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87903811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31435 + ... + 34116.

It is an arithmetic number, because the mean of its divisors is an integer number (10652200).

Almost surely, 2^87903891 is an apocalyptic number.

87903891 is a deficient number, since it is larger than the sum of its proper divisors (39922509).

87903891 is a wasteful number, since it uses less digits than its factorization.

87903891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65706 (or 65703 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 87903891 is about 9375.7074933042. The cubic root of 87903891 is about 444.6340314750.

The spelling of 87903891 in words is "eighty-seven million, nine hundred three thousand, eight hundred ninety-one".