99587 has 4 divisors (see below), whose sum is σ = 101520. Its totient is φ = 97656.

The previous prime is 99581. The next prime is 99607. The reversal of 99587 is 78599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78599 = 53 ⋅1483.

It is a cyclic number.

It is not a de Polignac number, because 99587 - 2⁴ = 99571 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 99587.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 99587.

It is not an unprimeable number, because it can be changed into a prime (99581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887 + ... + 992.

It is an arithmetic number, because the mean of its divisors is an integer number (25380).

2⁹⁹⁵⁸⁷ is an apocalyptic number.

99587 is a deficient number, since it is larger than the sum of its proper divisors (1933).

99587 is a wasteful number, since it uses less digits than its factorization.

99587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932.

The product of its digits is 22680, while the sum is 38.

The square root of 99587 is about 315.5740800509. The cubic root of 99587 is about 46.3519009595.

It can be divided in two parts, 99 and 587, that added together give a palindrome (686).

The spelling of 99587 in words is "ninety-nine thousand, five hundred eighty-seven".