90791 has 4 divisors (see below), whose sum is σ = 91512. Its totient is φ = 90072.

The previous prime is 90787. The next prime is 90793. The reversal of 90791 is 19709.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 90791 - 2² = 90787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90793) 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, 116 + ... + 441.

It is an arithmetic number, because the mean of its divisors is an integer number (22878).

2⁹⁰⁷⁹¹ is an apocalyptic number.

90791 is a deficient number, since it is larger than the sum of its proper divisors (721).

90791 is a wasteful number, since it uses less digits than its factorization.

90791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 90791 is about 301.3154493218. The cubic root of 90791 is about 44.9449532671.

The spelling of 90791 in words is "ninety thousand, seven hundred ninety-one".