13131444797 has 4 divisors (see below), whose sum is σ = 13132801500. Its totient is φ = 13130088096.

The previous prime is 13131444779. The next prime is 13131444829. The reversal of 13131444797 is 79744413131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79744413131 = 23 ⋅3467148397.

It can be written as a sum of positive squares in 2 ways, for example, as 3540964036 + 9590480761 = 59506^2 + 97931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13131444797 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 (13131444737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663728 + ... + 683225.

It is an arithmetic number, because the mean of its divisors is an integer number (3283200375).

Almost surely, 2^13131444797 is an apocalyptic number.

It is an amenable number.

13131444797 is a deficient number, since it is larger than the sum of its proper divisors (1356703).

13131444797 is an equidigital number, since it uses as much as digits as its factorization.

13131444797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356702.

The product of its digits is 254016, while the sum is 44.

The spelling of 13131444797 in words is "thirteen billion, one hundred thirty-one million, four hundred forty-four thousand, seven hundred ninety-seven".