99809196 has 12 divisors (see below), whose sum is σ = 232888152. Its totient is φ = 33269728.

The previous prime is 99809191. The next prime is 99809207. The reversal of 99809196 is 69190899.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (99809191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4158705 + ... + 4158728.

It is an arithmetic number, because the mean of its divisors is an integer number (19407346).

Almost surely, 2^99809196 is an apocalyptic number.

It is an amenable number.

99809196 is an abundant number, since it is smaller than the sum of its proper divisors (133078956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99809196 is a wasteful number, since it uses less digits than its factorization.

99809196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8317440 (or 8317438 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 99809196 is about 9990.4552448825. The cubic root of 99809196 is about 463.8634841651.

The spelling of 99809196 in words is "ninety-nine million, eight hundred nine thousand, one hundred ninety-six".