90913159 has 4 divisors (see below), whose sum is σ = 92454120. Its totient is φ = 89372200.

The previous prime is 90913129. The next prime is 90913177. The reversal of 90913159 is 95131909.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90913159 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 (90913129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770392 + ... + 770509.

It is an arithmetic number, because the mean of its divisors is an integer number (23113530).

Almost surely, 2^90913159 is an apocalyptic number.

90913159 is a deficient number, since it is larger than the sum of its proper divisors (1540961).

90913159 is a wasteful number, since it uses less digits than its factorization.

90913159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540960.

The product of its (nonzero) digits is 10935, while the sum is 37.

The square root of 90913159 is about 9534.8392225564. The cubic root of 90913159 is about 449.6510199670.

The spelling of 90913159 in words is "ninety million, nine hundred thirteen thousand, one hundred fifty-nine".