99815799 has 8 divisors (see below), whose sum is σ = 133233520. Its totient is φ = 66470976.

The previous prime is 99815773. The next prime is 99815803. The reversal of 99815799 is 99751899.

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

It is not a de Polignac number, because 99815799 - 2⁷ = 99815671 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 (99815719) 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, 14944 + ... + 20565.

It is an arithmetic number, because the mean of its divisors is an integer number (16654190).

Almost surely, 2^99815799 is an apocalyptic number.

99815799 is a deficient number, since it is larger than the sum of its proper divisors (33417721).

99815799 is a wasteful number, since it uses less digits than its factorization.

99815799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36449.

The product of its digits is 1837080, while the sum is 57.

The square root of 99815799 is about 9990.7857048382. The cubic root of 99815799 is about 463.8737130925.

The spelling of 99815799 in words is "ninety-nine million, eight hundred fifteen thousand, seven hundred ninety-nine".