87913231 has 8 divisors (see below), whose sum is σ = 100592640. Its totient is φ = 75263928.

The previous prime is 87913207. The next prime is 87913271. The reversal of 87913231 is 13231978.

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 87913231 - 2¹¹ = 87911183 is a prime.

It is a super-2 number, since 2×87913231² = 15457472369718722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87913271) 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, 871 + ... + 13288.

It is an arithmetic number, because the mean of its divisors is an integer number (12574080).

Almost surely, 2^87913231 is an apocalyptic number.

87913231 is a deficient number, since it is larger than the sum of its proper divisors (12679409).

87913231 is a wasteful number, since it uses less digits than its factorization.

87913231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15053.

The product of its digits is 9072, while the sum is 34.

The square root of 87913231 is about 9376.2055758180. The cubic root of 87913231 is about 444.6497787293.

The spelling of 87913231 in words is "eighty-seven million, nine hundred thirteen thousand, two hundred thirty-one".