13928478689 has 2 divisors, whose sum is σ = 13928478690. Its totient is φ = 13928478688.

The previous prime is 13928478677. The next prime is 13928478763. The reversal of 13928478689 is 98687482931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10804563025 + 3123915664 = 103945^2 + 55892^2 .

It is a cyclic number.

It is not a de Polignac number, because 13928478689 - 2⁴ = 13928478673 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 (13928478659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6964239344 + 6964239345.

It is an arithmetic number, because the mean of its divisors is an integer number (6964239345).

Almost surely, 2^13928478689 is an apocalyptic number.

It is an amenable number.

13928478689 is a deficient number, since it is larger than the sum of its proper divisors (1).

13928478689 is an equidigital number, since it uses as much as digits as its factorization.

13928478689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41803776, while the sum is 65.

The spelling of 13928478689 in words is "thirteen billion, nine hundred twenty-eight million, four hundred seventy-eight thousand, six hundred eighty-nine".