91289 has 8 divisors (see below), whose sum is σ = 102432. Its totient is φ = 80640.

The previous prime is 91283. The next prime is 91291. The reversal of 91289 is 98219.

91289 is nontrivially palindromic in base 13.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91289 - 2⁸ = 91033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377 + ... + 569.

It is an arithmetic number, because the mean of its divisors is an integer number (12804).

2⁹¹²⁸⁹ is an apocalyptic number.

It is an amenable number.

91289 is a deficient number, since it is larger than the sum of its proper divisors (11143).

91289 is a wasteful number, since it uses less digits than its factorization.

91289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247.

The product of its digits is 1296, while the sum is 29.

The square root of 91289 is about 302.1406957032. The cubic root of 91289 is about 45.0269797059.

It can be divided in two parts, 912 and 89, that added together give a palindrome (1001).

The spelling of 91289 in words is "ninety-one thousand, two hundred eighty-nine".