90857163 has 32 divisors (see below), whose sum is σ = 133462080. Its totient is φ = 54743040.

The previous prime is 90857161. The next prime is 90857191. The reversal of 90857163 is 36175809.

It is not a de Polignac number, because 90857163 - 2¹ = 90857161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90857161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167673 + ... + 168213.

It is an arithmetic number, because the mean of its divisors is an integer number (4170690).

Almost surely, 2^90857163 is an apocalyptic number.

90857163 is a deficient number, since it is larger than the sum of its proper divisors (42604917).

90857163 is a wasteful number, since it uses less digits than its factorization.

90857163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 90857163 is about 9531.9023809521. The cubic root of 90857163 is about 449.5586833901.

The spelling of 90857163 in words is "ninety million, eight hundred fifty-seven thousand, one hundred sixty-three".