13681746979 has 2 divisors, whose sum is σ = 13681746980. Its totient is φ = 13681746978.

The previous prime is 13681746959. The next prime is 13681746983. The reversal of 13681746979 is 97964718631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13681746979 - 2⁹ = 13681746467 is a prime.

It is not a weakly prime, because it can be changed into another prime (13681746919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6840873489 + 6840873490.

It is an arithmetic number, because the mean of its divisors is an integer number (6840873490).

Almost surely, 2^13681746979 is an apocalyptic number.

13681746979 is a deficient number, since it is larger than the sum of its proper divisors (1).

13681746979 is an equidigital number, since it uses as much as digits as its factorization.

13681746979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 61.

The spelling of 13681746979 in words is "thirteen billion, six hundred eighty-one million, seven hundred forty-six thousand, nine hundred seventy-nine".