900945857 has 16 divisors (see below), whose sum is σ = 1130972160. Its totient is φ = 699784272.

The previous prime is 900945833. The next prime is 900945863. The reversal of 900945857 is 758549009.

It is a cyclic number.

It is not a de Polignac number, because 900945857 - 2⁸ = 900945601 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900941857) 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, 144203 + ... + 150320.

It is an arithmetic number, because the mean of its divisors is an integer number (70685760).

Almost surely, 2^900945857 is an apocalyptic number.

It is an amenable number.

900945857 is a deficient number, since it is larger than the sum of its proper divisors (230026303).

900945857 is a wasteful number, since it uses less digits than its factorization.

900945857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294572.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 900945857 is about 30015.7601436312. The cubic root of 900945857 is about 965.8274939258.

The spelling of 900945857 in words is "nine hundred million, nine hundred forty-five thousand, eight hundred fifty-seven".