5109123791 has 6 divisors (see below), whose sum is σ = 5340918240. Its totient is φ = 4886987468.

The previous prime is 5109123751. The next prime is 5109123797. The reversal of 5109123791 is 1973219015.

It is not a de Polignac number, because 5109123791 - 2¹⁴ = 5109107407 is a prime.

It is a super-2 number, since 2×5109123791² = 52206291823524423362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5109123797) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4828511 + ... + 4829568.

It is an arithmetic number, because the mean of its divisors is an integer number (890153040).

Almost surely, 2^5109123791 is an apocalyptic number.

5109123791 is a deficient number, since it is larger than the sum of its proper divisors (231794449).

5109123791 is an equidigital number, since it uses as much as digits as its factorization.

5109123791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9658125 (or 9658102 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 5109123791 is about 71478.1350554140. The cubic root of 5109123791 is about 1722.3264659049.

The spelling of 5109123791 in words is "five billion, one hundred nine million, one hundred twenty-three thousand, seven hundred ninety-one".