90717159 has 8 divisors (see below), whose sum is σ = 130260592. Its totient is φ = 55825920.

The previous prime is 90717157. The next prime is 90717163. The reversal of 90717159 is 95171709.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90717159 - 2¹ = 90717157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2326081 = 90717159 / (9 + 0 + 7 + 1 + 7 + 1 + 5 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90717157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163002 + ... + 1163079.

It is an arithmetic number, because the mean of its divisors is an integer number (16282574).

Almost surely, 2^90717159 is an apocalyptic number.

90717159 is a deficient number, since it is larger than the sum of its proper divisors (39543433).

90717159 is a wasteful number, since it uses less digits than its factorization.

90717159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326097.

The product of its (nonzero) digits is 19845, while the sum is 39.

The square root of 90717159 is about 9524.5555801833. Note that the first 4 decimals coincide. The cubic root of 90717159 is about 449.3276527330.

The spelling of 90717159 in words is "ninety million, seven hundred seventeen thousand, one hundred fifty-nine".