99724198 has 16 divisors (see below), whose sum is σ = 179953920. Its totient is φ = 40489416.

The previous prime is 99724171. The next prime is 99724199. The reversal of 99724198 is 89142799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99724199) 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, 187186 + ... + 187717.

It is an arithmetic number, because the mean of its divisors is an integer number (11247120).

Almost surely, 2^99724198 is an apocalyptic number.

99724198 is a deficient number, since it is larger than the sum of its proper divisors (80229722).

99724198 is a wasteful number, since it uses less digits than its factorization.

99724198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374931.

The product of its digits is 326592, while the sum is 49.

The square root of 99724198 is about 9986.2003785224. The cubic root of 99724198 is about 463.7317706306.

The spelling of 99724198 in words is "ninety-nine million, seven hundred twenty-four thousand, one hundred ninety-eight".