99431896197 has 16 divisors (see below), whose sum is σ = 135684538880. Its totient is φ = 64734172272.

The previous prime is 99431896181. The next prime is 99431896247. The reversal of 99431896197 is 79169813499.

It is not a de Polignac number, because 99431896197 - 2⁴ = 99431896181 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 (99431896127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643254 + ... + 782712.

It is an arithmetic number, because the mean of its divisors is an integer number (8480283680).

Almost surely, 2^99431896197 is an apocalyptic number.

It is an amenable number.

99431896197 is a deficient number, since it is larger than the sum of its proper divisors (36252642683).

99431896197 is a wasteful number, since it uses less digits than its factorization.

99431896197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145032.

The product of its digits is 26453952, while the sum is 66.

The spelling of 99431896197 in words is "ninety-nine billion, four hundred thirty-one million, eight hundred ninety-six thousand, one hundred ninety-seven".