87853891 has 16 divisors (see below), whose sum is σ = 95040000. Its totient is φ = 80955936.

The previous prime is 87853877. The next prime is 87853897. The reversal of 87853891 is 19835878.

It is a cyclic number.

It is not a de Polignac number, because 87853891 - 2¹¹ = 87851843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87853897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121830 + ... + 122548.

It is an arithmetic number, because the mean of its divisors is an integer number (5940000).

Almost surely, 2^87853891 is an apocalyptic number.

87853891 is a deficient number, since it is larger than the sum of its proper divisors (7186109).

87853891 is a wasteful number, since it uses less digits than its factorization.

87853891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its digits is 483840, while the sum is 49.

The square root of 87853891 is about 9373.0406485836. The cubic root of 87853891 is about 444.5497124238.

The spelling of 87853891 in words is "eighty-seven million, eight hundred fifty-three thousand, eight hundred ninety-one".