91749103039 has 16 divisors (see below), whose sum is σ = 100465940736. Its totient is φ = 83095360000.

The previous prime is 91749102997. The next prime is 91749103063. The reversal of 91749103039 is 93030194719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91749103039 is a prime.

It is a super-2 number, since 2×91749103039² (a number of 23 digits) contains 22 as substring.

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 91749103039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91749103099) 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, 4635414 + ... + 4655164.

It is an arithmetic number, because the mean of its divisors is an integer number (6279121296).

Almost surely, 2^91749103039 is an apocalyptic number.

91749103039 is a deficient number, since it is larger than the sum of its proper divisors (8716837697).

91749103039 is a wasteful number, since it uses less digits than its factorization.

91749103039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21326.

The product of its (nonzero) digits is 183708, while the sum is 46.

The spelling of 91749103039 in words is "ninety-one billion, seven hundred forty-nine million, one hundred three thousand, thirty-nine".