87989873 has 8 divisors (see below), whose sum is σ = 91011840. Its totient is φ = 84979440.

The previous prime is 87989851. The next prime is 87989879. The reversal of 87989873 is 37898978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87989873 - 2⁶ = 87989809 is a prime.

It is a super-2 number, since 2×87989873² = 15484435501112258, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87989879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14363 + ... + 19551.

It is an arithmetic number, because the mean of its divisors is an integer number (11376480).

Almost surely, 2^87989873 is an apocalyptic number.

It is an amenable number.

87989873 is a deficient number, since it is larger than the sum of its proper divisors (3021967).

87989873 is a wasteful number, since it uses less digits than its factorization.

87989873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5767.

The product of its digits is 6096384, while the sum is 59.

The square root of 87989873 is about 9380.2917332032. The cubic root of 87989873 is about 444.7789551515.

The spelling of 87989873 in words is "eighty-seven million, nine hundred eighty-nine thousand, eight hundred seventy-three".