99019909 has 2 divisors, whose sum is σ = 99019910. Its totient is φ = 99019908.

The previous prime is 99019889. The next prime is 99019919. The reversal of 99019909 is 90991099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97121025 + 1898884 = 9855^2 + 1378^2 .

It is a cyclic number.

It is not a de Polignac number, because 99019909 - 2⁹ = 99019397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99019919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49509954 + 49509955.

It is an arithmetic number, because the mean of its divisors is an integer number (49509955).

Almost surely, 2^99019909 is an apocalyptic number.

It is an amenable number.

99019909 is a deficient number, since it is larger than the sum of its proper divisors (1).

99019909 is an equidigital number, since it uses as much as digits as its factorization.

99019909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59049, while the sum is 46.

The square root of 99019909 is about 9950.8747856658. The cubic root of 99019909 is about 462.6375090513.

The spelling of 99019909 in words is "ninety-nine million, nineteen thousand, nine hundred nine".