13978569337 has 2 divisors, whose sum is σ = 13978569338. Its totient is φ = 13978569336.

The previous prime is 13978569331. The next prime is 13978569349. The reversal of 13978569337 is 73396587931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13331935296 + 646634041 = 115464^2 + 25429^2 .

It is a cyclic number.

It is not a de Polignac number, because 13978569337 - 2¹¹ = 13978567289 is a prime.

It is not a weakly prime, because it can be changed into another prime (13978569331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6989284668 + 6989284669.

It is an arithmetic number, because the mean of its divisors is an integer number (6989284669).

Almost surely, 2^13978569337 is an apocalyptic number.

It is an amenable number.

13978569337 is a deficient number, since it is larger than the sum of its proper divisors (1).

13978569337 is an equidigital number, since it uses as much as digits as its factorization.

13978569337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25719120, while the sum is 61.

The spelling of 13978569337 in words is "thirteen billion, nine hundred seventy-eight million, five hundred sixty-nine thousand, three hundred thirty-seven".