899900857 has 16 divisors (see below), whose sum is σ = 971933760. Its totient is φ = 830621952.

The previous prime is 899900849. The next prime is 899900887. The reversal of 899900857 is 758009998.

It is a cyclic number.

It is not a de Polignac number, because 899900857 - 2³ = 899900849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 899900798 and 899900807.

It is not an unprimeable number, because it can be changed into a prime (899900887) 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 15 ways as a sum of consecutive naturals, for example, 111213 + ... + 119029.

It is an arithmetic number, because the mean of its divisors is an integer number (60745860).

Almost surely, 2^899900857 is an apocalyptic number.

It is an amenable number.

899900857 is a deficient number, since it is larger than the sum of its proper divisors (72032903).

899900857 is a wasteful number, since it uses less digits than its factorization.

899900857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7992.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The square root of 899900857 is about 29998.3475711580. The cubic root of 899900857 is about 965.4539308911.

The spelling of 899900857 in words is "eight hundred ninety-nine million, nine hundred thousand, eight hundred fifty-seven".