13123791 has 12 divisors (see below), whose sum is σ = 19017232. Its totient is φ = 8721216.

The previous prime is 13123769. The next prime is 13123811. The reversal of 13123791 is 19732131.

It is not a de Polignac number, because 13123791 - 2⁶ = 13123727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123741) 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, 870 + ... + 5196.

Almost surely, 2^13123791 is an apocalyptic number.

13123791 is a deficient number, since it is larger than the sum of its proper divisors (5893441).

13123791 is a wasteful number, since it uses less digits than its factorization.

13123791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670 (or 4667 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 13123791 is about 3622.6773248524. The cubic root of 13123791 is about 235.8774560099.

It can be divided in two parts, 131237 and 91, that added together give a triangular number (131328 = T₅₁₂).

The spelling of 13123791 in words is "thirteen million, one hundred twenty-three thousand, seven hundred ninety-one".