13537943917 has 2 divisors, whose sum is σ = 13537943918. Its totient is φ = 13537943916.

The previous prime is 13537943849. The next prime is 13537943929. The reversal of 13537943917 is 71934973531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12413079396 + 1124864521 = 111414^2 + 33539^2 .

It is an emirp because it is prime and its reverse (71934973531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13537943917 - 2¹¹ = 13537941869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13537943977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6768971958 + 6768971959.

It is an arithmetic number, because the mean of its divisors is an integer number (6768971959).

Almost surely, 2^13537943917 is an apocalyptic number.

It is an amenable number.

13537943917 is a deficient number, since it is larger than the sum of its proper divisors (1).

13537943917 is an equidigital number, since it uses as much as digits as its factorization.

13537943917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2143260, while the sum is 52.

The spelling of 13537943917 in words is "thirteen billion, five hundred thirty-seven million, nine hundred forty-three thousand, nine hundred seventeen".