99999207 has 24 divisors (see below), whose sum is σ = 180086400. Its totient is φ = 51947280.

The previous prime is 99999187. The next prime is 99999217. The reversal of 99999207 is 70299999.

It is not a de Polignac number, because 99999207 - 2⁷ = 99999079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71457 + ... + 72842.

It is an arithmetic number, because the mean of its divisors is an integer number (7503600).

Almost surely, 2^99999207 is an apocalyptic number.

99999207 is a deficient number, since it is larger than the sum of its proper divisors (80087193).

99999207 is a wasteful number, since it uses less digits than its factorization.

99999207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144323 (or 144320 counting only the distinct ones).

The product of its (nonzero) digits is 826686, while the sum is 54.

The square root of 99999207 is about 9999.9603499214. The cubic root of 99999207 is about 464.1576564314.

The spelling of 99999207 in words is "ninety-nine million, nine hundred ninety-nine thousand, two hundred seven".