87320893 has 16 divisors (see below), whose sum is σ = 98998272. Its totient is φ = 76302000.

The previous prime is 87320879. The next prime is 87320911. The reversal of 87320893 is 39802378.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87320893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87320803) 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, 54798 + ... + 56368.

It is an arithmetic number, because the mean of its divisors is an integer number (6187392).

Almost surely, 2^87320893 is an apocalyptic number.

It is an amenable number.

87320893 is a deficient number, since it is larger than the sum of its proper divisors (11677379).

87320893 is a wasteful number, since it uses less digits than its factorization.

87320893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 87320893 is about 9344.5648908871. The cubic root of 87320893 is about 443.6488800073.

The spelling of 87320893 in words is "eighty-seven million, three hundred twenty thousand, eight hundred ninety-three".