99724207 has 12 divisors (see below), whose sum is σ = 111259288. Its totient is φ = 89298000.

The previous prime is 99724199. The next prime is 99724237. The reversal of 99724207 is 70242799.

It is not a de Polignac number, because 99724207 - 2³ = 99724199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99724207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99724237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1957 + ... + 14257.

Almost surely, 2^99724207 is an apocalyptic number.

99724207 is a deficient number, since it is larger than the sum of its proper divisors (11535081).

99724207 is a wasteful number, since it uses less digits than its factorization.

99724207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12390 (or 12379 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 99724207 is about 9986.2008291442. The cubic root of 99724207 is about 463.7317845811.

The spelling of 99724207 in words is "ninety-nine million, seven hundred twenty-four thousand, two hundred seven".