99920207 has 2 divisors, whose sum is σ = 99920208. Its totient is φ = 99920206.

The previous prime is 99920189. The next prime is 99920231. The reversal of 99920207 is 70202999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99920207 - 2⁸ = 99919951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99920267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49960103 + 49960104.

It is an arithmetic number, because the mean of its divisors is an integer number (49960104).

Almost surely, 2^99920207 is an apocalyptic number.

99920207 is a deficient number, since it is larger than the sum of its proper divisors (1).

99920207 is an equidigital number, since it uses as much as digits as its factorization.

99920207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 99920207 is about 9996.0095538170. The cubic root of 99920207 is about 464.0353950778.

The spelling of 99920207 in words is "ninety-nine million, nine hundred twenty thousand, two hundred seven".