89191 has 4 divisors (see below), whose sum is σ = 90400. Its totient is φ = 87984.

The previous prime is 89189. The next prime is 89203. The reversal of 89191 is 19198.

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 89191 - 2¹ = 89189 is a prime.

It is a Duffinian number.

89191 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89101) 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, 486 + ... + 643.

It is an arithmetic number, because the mean of its divisors is an integer number (22600).

2⁸⁹¹⁹¹ is an apocalyptic number.

89191 is a deficient number, since it is larger than the sum of its proper divisors (1209).

89191 is a wasteful number, since it uses less digits than its factorization.

89191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208.

The product of its digits is 648, while the sum is 28.

The square root of 89191 is about 298.6486229669. The cubic root of 89191 is about 44.6793669487.

The spelling of 89191 in words is "eighty-nine thousand, one hundred ninety-one".