99800099 has 16 divisors (see below), whose sum is σ = 116433408. Its totient is φ = 83780352.

The previous prime is 99800089. The next prime is 99800101. The reversal of 99800099 is 99000899.

It is a Cunningham number, because it is equal to 9990²-1.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99800099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99800009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69224 + ... + 70650.

It is an arithmetic number, because the mean of its divisors is an integer number (7277088).

Almost surely, 2^99800099 is an apocalyptic number.

99800099 is a deficient number, since it is larger than the sum of its proper divisors (16633309).

99800099 is a wasteful number, since it uses less digits than its factorization.

99800099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 99800099 is about 9989.9999499499. Note that the first 4 decimals coincide. The cubic root of 99800099 is about 463.8493909603.

The spelling of 99800099 in words is "ninety-nine million, eight hundred thousand, ninety-nine".