89791 has 4 divisors (see below), whose sum is σ = 96712. Its totient is φ = 82872.

The previous prime is 89783. The next prime is 89797. The reversal of 89791 is 19798.

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

It is a cyclic number.

It is not a de Polignac number, because 89791 - 2³ = 89783 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 (89797) 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 3 ways as a sum of consecutive naturals, for example, 3441 + ... + 3466.

It is an arithmetic number, because the mean of its divisors is an integer number (24178).

2⁸⁹⁷⁹¹ is an apocalyptic number.

89791 is a deficient number, since it is larger than the sum of its proper divisors (6921).

89791 is a wasteful number, since it uses less digits than its factorization.

89791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6920.

The product of its digits is 4536, while the sum is 34.

The square root of 89791 is about 299.6514642047. The cubic root of 89791 is about 44.7793311864.

The spelling of 89791 in words is "eighty-nine thousand, seven hundred ninety-one".