99559799 has 4 divisors (see below), whose sum is σ = 99588864. Its totient is φ = 99530736.

The previous prime is 99559781. The next prime is 99559819. The reversal of 99559799 is 99795599.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99559799 - 2²⁰ = 98511223 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 (99559739) 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, 8582 + ... + 16515.

It is an arithmetic number, because the mean of its divisors is an integer number (24897216).

Almost surely, 2^99559799 is an apocalyptic number.

99559799 is a deficient number, since it is larger than the sum of its proper divisors (29065).

99559799 is a wasteful number, since it uses less digits than its factorization.

99559799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29064.

The product of its digits is 10333575, while the sum is 62.

The square root of 99559799 is about 9977.9656744248. The cubic root of 99559799 is about 463.4768041916.

The spelling of 99559799 in words is "ninety-nine million, five hundred fifty-nine thousand, seven hundred ninety-nine".