999909359 has 2 divisors, whose sum is σ = 999909360. Its totient is φ = 999909358.

The previous prime is 999909343. The next prime is 999909373. The reversal of 999909359 is 953909999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999909359 - 2⁴ = 999909343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999909389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499954679 + 499954680.

It is an arithmetic number, because the mean of its divisors is an integer number (499954680).

Almost surely, 2^999909359 is an apocalyptic number.

999909359 is a deficient number, since it is larger than the sum of its proper divisors (1).

999909359 is an equidigital number, since it uses as much as digits as its factorization.

999909359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7971615, while the sum is 62.

The square root of 999909359 is about 31621.3434091596. The cubic root of 999909359 is about 999.9697854204.

The spelling of 999909359 in words is "nine hundred ninety-nine million, nine hundred nine thousand, three hundred fifty-nine".