91248933439 has 4 divisors (see below), whose sum is σ = 91263357360. Its totient is φ = 91234509520.

The previous prime is 91248933427. The next prime is 91248933449. The reversal of 91248933439 is 93433984219.

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 91248933439 - 2⁹ = 91248932927 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 91248933439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91248933449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7202467 + ... + 7215124.

It is an arithmetic number, because the mean of its divisors is an integer number (22815839340).

Almost surely, 2^91248933439 is an apocalyptic number.

91248933439 is a deficient number, since it is larger than the sum of its proper divisors (14423921).

91248933439 is a wasteful number, since it uses less digits than its factorization.

91248933439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14423920.

The product of its digits is 5038848, while the sum is 55.

The spelling of 91248933439 in words is "ninety-one billion, two hundred forty-eight million, nine hundred thirty-three thousand, four hundred thirty-nine".