99799799 has 8 divisors (see below), whose sum is σ = 114602880. Its totient is φ = 85951800.

The previous prime is 99799789. The next prime is 99799813.

99799799 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-99799799 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 (99799709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238547 + ... + 238964.

It is an arithmetic number, because the mean of its divisors is an integer number (14325360).

Almost surely, 2^99799799 is an apocalyptic number.

99799799 is a deficient number, since it is larger than the sum of its proper divisors (14803081).

99799799 is a wasteful number, since it uses less digits than its factorization.

99799799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477541.

The product of its digits is 26040609, while the sum is 68.

The square root of 99799799 is about 9989.9849349236. The cubic root of 99799799 is about 463.8489261813.

The spelling of 99799799 in words is "ninety-nine million, seven hundred ninety-nine thousand, seven hundred ninety-nine".