99907999 has 2 divisors, whose sum is σ = 99908000. Its totient is φ = 99907998.

The previous prime is 99907993. The next prime is 99908027. The reversal of 99907999 is 99970999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99907999 - 2⁵ = 99907967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99907993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49953999 + 49954000.

It is an arithmetic number, because the mean of its divisors is an integer number (49954000).

Almost surely, 2^99907999 is an apocalyptic number.

99907999 is a deficient number, since it is larger than the sum of its proper divisors (1).

99907999 is an equidigital number, since it uses as much as digits as its factorization.

99907999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3720087, while the sum is 61.

The square root of 99907999 is about 9995.3988914900. The cubic root of 99907999 is about 464.0164960817.

The spelling of 99907999 in words is "ninety-nine million, nine hundred seven thousand, nine hundred ninety-nine".