90911793 has 16 divisors (see below), whose sum is σ = 138727296. Its totient is φ = 51876480.

The previous prime is 90911759. The next prime is 90911797. The reversal of 90911793 is 39711909.

It is not a de Polignac number, because 90911793 - 2⁶ = 90911729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90911797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14605 + ... + 19877.

It is an arithmetic number, because the mean of its divisors is an integer number (8670456).

Almost surely, 2^90911793 is an apocalyptic number.

It is an amenable number.

90911793 is a deficient number, since it is larger than the sum of its proper divisors (47815503).

90911793 is a wasteful number, since it uses less digits than its factorization.

90911793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6104.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 90911793 is about 9534.7675902457. The cubic root of 90911793 is about 449.6487679044.

The spelling of 90911793 in words is "ninety million, nine hundred eleven thousand, seven hundred ninety-three".