90897159 has 16 divisors (see below), whose sum is σ = 127779200. Its totient is φ = 57316896.

The previous prime is 90897151. The next prime is 90897161. The reversal of 90897159 is 95179809.

It is not a de Polignac number, because 90897159 - 2³ = 90897151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90897151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61572 + ... + 63030.

It is an arithmetic number, because the mean of its divisors is an integer number (7986200).

Almost surely, 2^90897159 is an apocalyptic number.

90897159 is a deficient number, since it is larger than the sum of its proper divisors (36882041).

90897159 is a wasteful number, since it uses less digits than its factorization.

90897159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 90897159 is about 9534.0001573317. Note that the first 3 decimals coincide. The cubic root of 90897159 is about 449.6246400733.

The spelling of 90897159 in words is "ninety million, eight hundred ninety-seven thousand, one hundred fifty-nine".