87300991 has 24 divisors (see below), whose sum is σ = 98755200. Its totient is φ = 76991040.

The previous prime is 87300973. The next prime is 87301073. The reversal of 87300991 is 19900378.

It is not a de Polignac number, because 87300991 - 2⁵ = 87300959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87300991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87300391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324405 + ... + 324673.

It is an arithmetic number, because the mean of its divisors is an integer number (4114800).

Almost surely, 2^87300991 is an apocalyptic number.

87300991 is a deficient number, since it is larger than the sum of its proper divisors (11454209).

87300991 is a wasteful number, since it uses less digits than its factorization.

87300991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 87300991 is about 9343.4999331086. The cubic root of 87300991 is about 443.6151722634.

The spelling of 87300991 in words is "eighty-seven million, three hundred thousand, nine hundred ninety-one".