13443979 has 2 divisors, whose sum is σ = 13443980. Its totient is φ = 13443978.

The previous prime is 13443977. The next prime is 13444007. The reversal of 13443979 is 97934431.

It is a happy number.

13443979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13443979 - 2¹ = 13443977 is a prime.

Together with 13443977, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13443977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6721989 + 6721990.

It is an arithmetic number, because the mean of its divisors is an integer number (6721990).

Almost surely, 2^13443979 is an apocalyptic number.

13443979 is a deficient number, since it is larger than the sum of its proper divisors (1).

13443979 is an equidigital number, since it uses as much as digits as its factorization.

13443979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 13443979 is about 3666.6031964204. The cubic root of 13443979 is about 237.7803389556.

The spelling of 13443979 in words is "thirteen million, four hundred forty-three thousand, nine hundred seventy-nine".