13238779 has 2 divisors, whose sum is σ = 13238780. Its totient is φ = 13238778.

The previous prime is 13238747. The next prime is 13238807. The reversal of 13238779 is 97783231.

13238779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13238779 - 2⁵ = 13238747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13238579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6619389 + 6619390.

It is an arithmetic number, because the mean of its divisors is an integer number (6619390).

Almost surely, 2^13238779 is an apocalyptic number.

13238779 is a deficient number, since it is larger than the sum of its proper divisors (1).

13238779 is an equidigital number, since it uses as much as digits as its factorization.

13238779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 40.

The square root of 13238779 is about 3638.5132952897. The cubic root of 13238779 is about 236.5643572422.

The spelling of 13238779 in words is "thirteen million, two hundred thirty-eight thousand, seven hundred seventy-nine".