13978569593 has 2 divisors, whose sum is σ = 13978569594. Its totient is φ = 13978569592.

The previous prime is 13978569587. The next prime is 13978569607. The reversal of 13978569593 is 39596587931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8137483264 + 5841086329 = 90208^2 + 76427^2 .

It is a cyclic number.

It is not a de Polignac number, because 13978569593 - 2⁸ = 13978569337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13978569533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6989284796 + 6989284797.

It is an arithmetic number, because the mean of its divisors is an integer number (6989284797).

Almost surely, 2^13978569593 is an apocalyptic number.

It is an amenable number.

13978569593 is a deficient number, since it is larger than the sum of its proper divisors (1).

13978569593 is an equidigital number, since it uses as much as digits as its factorization.

13978569593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55112400, while the sum is 65.

The spelling of 13978569593 in words is "thirteen billion, nine hundred seventy-eight million, five hundred sixty-nine thousand, five hundred ninety-three".