91338593 has 4 divisors (see below), whose sum is σ = 91587840. Its totient is φ = 91089348.

The previous prime is 91338587. The next prime is 91338613. The reversal of 91338593 is 39583319.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91338593 - 2⁸ = 91338337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91338593.

It is not an unprimeable number, because it can be changed into a prime (91338503) 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, 124073 + ... + 124806.

It is an arithmetic number, because the mean of its divisors is an integer number (22896960).

Almost surely, 2^91338593 is an apocalyptic number.

It is an amenable number.

91338593 is a deficient number, since it is larger than the sum of its proper divisors (249247).

91338593 is a wasteful number, since it uses less digits than its factorization.

91338593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249246.

The product of its digits is 87480, while the sum is 41.

The square root of 91338593 is about 9557.1226318385. The cubic root of 91338593 is about 450.3513190663.

The spelling of 91338593 in words is "ninety-one million, three hundred thirty-eight thousand, five hundred ninety-three".