13279391 has 2 divisors, whose sum is σ = 13279392. Its totient is φ = 13279390.

The previous prime is 13279373. The next prime is 13279403. The reversal of 13279391 is 19397231.

13279391 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 13279391 - 2¹⁰ = 13278367 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13279351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6639695 + 6639696.

It is an arithmetic number, because the mean of its divisors is an integer number (6639696).

Almost surely, 2^13279391 is an apocalyptic number.

13279391 is a deficient number, since it is larger than the sum of its proper divisors (1).

13279391 is an equidigital number, since it uses as much as digits as its factorization.

13279391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 13279391 is about 3644.0898726568. The cubic root of 13279391 is about 236.8060095470.

The spelling of 13279391 in words is "thirteen million, two hundred seventy-nine thousand, three hundred ninety-one".