99599 has 4 divisors (see below), whose sum is σ = 100464. Its totient is φ = 98736.

The previous prime is 99581. The next prime is 99607.

99599 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99599 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 (99529) 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, 227 + ... + 500.

It is an arithmetic number, because the mean of its divisors is an integer number (25116).

2⁹⁹⁵⁹⁹ is an apocalyptic number.

99599 is a deficient number, since it is larger than the sum of its proper divisors (865).

99599 is a wasteful number, since it uses less digits than its factorization.

99599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its digits is 32805, while the sum is 41.

The square root of 99599 is about 315.5930924466. The cubic root of 99599 is about 46.3537626499.

The spelling of 99599 in words is "ninety-nine thousand, five hundred ninety-nine".