99721194 has 16 divisors (see below), whose sum is σ = 199594368. Its totient is φ = 33215072.

The previous prime is 99721163. The next prime is 99721229. The reversal of 99721194 is 49112799.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3334 + ... + 14510.

It is an arithmetic number, because the mean of its divisors is an integer number (12474648).

Almost surely, 2^99721194 is an apocalyptic number.

99721194 is an abundant number, since it is smaller than the sum of its proper divisors (99873174).

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

99721194 is a wasteful number, since it uses less digits than its factorization.

99721194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12669.

The product of its digits is 40824, while the sum is 42.

The square root of 99721194 is about 9986.0499698329. The cubic root of 99721194 is about 463.7271142408.

The spelling of 99721194 in words is "ninety-nine million, seven hundred twenty-one thousand, one hundred ninety-four".