91384239 has 12 divisors (see below), whose sum is σ = 122595144. Its totient is φ = 60549984.

The previous prime is 91384229. The next prime is 91384253. The reversal of 91384239 is 93248319.

It is not a de Polignac number, because 91384239 - 2⁵ = 91384207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91384197 and 91384206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91384229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229989 + ... + 230385.

It is an arithmetic number, because the mean of its divisors is an integer number (10216262).

Almost surely, 2^91384239 is an apocalyptic number.

91384239 is a deficient number, since it is larger than the sum of its proper divisors (31210905).

91384239 is an equidigital number, since it uses as much as digits as its factorization.

91384239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954 (or 677 counting only the distinct ones).

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

The square root of 91384239 is about 9559.5103954125. The cubic root of 91384239 is about 450.4263268376.

The spelling of 91384239 in words is "ninety-one million, three hundred eighty-four thousand, two hundred thirty-nine".