87399 has 20 divisors (see below), whose sum is σ = 142296. Its totient is φ = 53136.

The previous prime is 87383. The next prime is 87403. The reversal of 87399 is 99378.

It is not a de Polignac number, because 87399 - 2⁴ = 87383 is a prime.

Its product of digits (13608) is a multiple of the sum of its prime factors (108).

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 87399.

It is not an unprimeable number, because it can be changed into a prime (87359) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1012 + ... + 1094.

2⁸⁷³⁹⁹ is an apocalyptic number.

87399 is a deficient number, since it is larger than the sum of its proper divisors (54897).

87399 is a wasteful number, since it uses less digits than its factorization.

87399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 99 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 87399 is about 295.6332187018. The cubic root of 87399 is about 44.3781119288.

The spelling of 87399 in words is "eighty-seven thousand, three hundred ninety-nine".