900079999 has 64 divisors (see below), whose sum is σ = 1207793664. Its totient is φ = 651442176.

The previous prime is 900079997. The next prime is 900080003. The reversal of 900079999 is 999970009.

It is not a de Polignac number, because 900079999 - 2¹ = 900079997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900079991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6569859 + ... + 6569995.

It is an arithmetic number, because the mean of its divisors is an integer number (18871776).

Almost surely, 2^900079999 is an apocalyptic number.

900079999 is a deficient number, since it is larger than the sum of its proper divisors (307713665).

900079999 is a wasteful number, since it uses less digits than its factorization.

900079999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296.

The product of its (nonzero) digits is 413343, while the sum is 52.

The square root of 900079999 is about 30001.3332870391. Note that the first 3 decimals coincide. The cubic root of 900079999 is about 965.5179904934.

The spelling of 900079999 in words is "nine hundred million, seventy-nine thousand, nine hundred ninety-nine".