99926809 has 2 divisors, whose sum is σ = 99926810.
Its totient is φ = 99926808.
The previous prime is 99926777. The next prime is 99926819. The reversal of 99926809 is 90862999.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 89718784 + 10208025 = 9472^2 + 3195^2
It is a cyclic number.
It is not a de Polignac number, because 99926809 - 25 = 99926777 is a prime.
It is not a weakly prime, because it can be changed into another prime (99926819) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49963404 + 49963405.
It is an arithmetic number, because the mean of its divisors is an integer number (49963405).
Almost surely, 299926809 is an apocalyptic number.
It is an amenable number.
99926809 is a deficient number, since it is larger than the sum of its proper divisors (1).
99926809 is an equidigital number, since it uses as much as digits as its factorization.
99926809 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 629856, while the sum is 52.
The square root of 99926809 is about 9996.3397801395.
The cubic root of 99926809 is about 464.0456148799.
The spelling of 99926809 in words is "ninety-nine million, nine hundred twenty-six thousand, eight hundred nine".