87873621 has 16 divisors (see below), whose sum is σ = 128798208. Its totient is φ = 52847600.

The previous prime is 87873607. The next prime is 87873637. The reversal of 87873621 is 12637878.

It is a cyclic number.

It is not a de Polignac number, because 87873621 - 2¹⁰ = 87872597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87873601) 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, 5841 + ... + 14486.

It is an arithmetic number, because the mean of its divisors is an integer number (8049888).

Almost surely, 2^87873621 is an apocalyptic number.

It is an amenable number.

87873621 is a deficient number, since it is larger than the sum of its proper divisors (40924587).

87873621 is a wasteful number, since it uses less digits than its factorization.

87873621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20472.

The product of its digits is 112896, while the sum is 42.

The square root of 87873621 is about 9374.0930761328. The cubic root of 87873621 is about 444.5829885418.

The spelling of 87873621 in words is "eighty-seven million, eight hundred seventy-three thousand, six hundred twenty-one".