13397517949 has 2 divisors, whose sum is σ = 13397517950. Its totient is φ = 13397517948.

The previous prime is 13397517929. The next prime is 13397517977. The reversal of 13397517949 is 94971579331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11587015449 + 1810502500 = 107643^2 + 42550^2 .

It is an emirp because it is prime and its reverse (94971579331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13397517949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13397517893 and 13397517902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13397517929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6698758974 + 6698758975.

It is an arithmetic number, because the mean of its divisors is an integer number (6698758975).

Almost surely, 2^13397517949 is an apocalyptic number.

It is an amenable number.

13397517949 is a deficient number, since it is larger than the sum of its proper divisors (1).

13397517949 is an equidigital number, since it uses as much as digits as its factorization.

13397517949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 58.

The spelling of 13397517949 in words is "thirteen billion, three hundred ninety-seven million, five hundred seventeen thousand, nine hundred forty-nine".