13404349979 has 2 divisors, whose sum is σ = 13404349980. Its totient is φ = 13404349978.

The previous prime is 13404349969. The next prime is 13404350041. The reversal of 13404349979 is 97994340431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13404349979 - 2²⁸ = 13135914523 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13404349979.

It is not a weakly prime, because it can be changed into another prime (13404349909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702174989 + 6702174990.

It is an arithmetic number, because the mean of its divisors is an integer number (6702174990).

Almost surely, 2^13404349979 is an apocalyptic number.

13404349979 is a deficient number, since it is larger than the sum of its proper divisors (1).

13404349979 is an equidigital number, since it uses as much as digits as its factorization.

13404349979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 13404349979 in words is "thirteen billion, four hundred four million, three hundred forty-nine thousand, nine hundred seventy-nine".