99431799 has 8 divisors (see below), whose sum is σ = 132722160. Its totient is φ = 66214656.

The previous prime is 99431791. The next prime is 99431803. The reversal of 99431799 is 99713499.

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

It is not a de Polignac number, because 99431799 - 2³ = 99431791 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99431791) 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, 15052 + ... + 20625.

It is an arithmetic number, because the mean of its divisors is an integer number (16590270).

Almost surely, 2^99431799 is an apocalyptic number.

99431799 is a deficient number, since it is larger than the sum of its proper divisors (33290361).

99431799 is a wasteful number, since it uses less digits than its factorization.

99431799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36609.

The product of its digits is 551124, while the sum is 51.

The square root of 99431799 is about 9971.5494783910. The cubic root of 99431799 is about 463.2780945597.

The spelling of 99431799 in words is "ninety-nine million, four hundred thirty-one thousand, seven hundred ninety-nine".