91489233 has 16 divisors (see below), whose sum is σ = 133330176. Its totient is φ = 55341840.

The previous prime is 91489231. The next prime is 91489243. The reversal of 91489233 is 33298419.

It is not a de Polignac number, because 91489233 - 2¹ = 91489231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91489191 and 91489200.

It is not an unprimeable number, because it can be changed into a prime (91489231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17010 + ... + 21732.

It is an arithmetic number, because the mean of its divisors is an integer number (8333136).

Almost surely, 2^91489233 is an apocalyptic number.

It is an amenable number.

91489233 is a deficient number, since it is larger than the sum of its proper divisors (41840943).

91489233 is a wasteful number, since it uses less digits than its factorization.

91489233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324.

The product of its digits is 46656, while the sum is 39.

The square root of 91489233 is about 9565.0004181913. Note that the first 3 decimals coincide. The cubic root of 91489233 is about 450.5987634346.

It can be divided in two parts, 9148 and 9233, that added together give a palindrome (18381).

The spelling of 91489233 in words is "ninety-one million, four hundred eighty-nine thousand, two hundred thirty-three".