13398391 has 2 divisors, whose sum is σ = 13398392. Its totient is φ = 13398390.

The previous prime is 13398383. The next prime is 13398421. The reversal of 13398391 is 19389331.

13398391 is digitally balanced in base 3, 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 13398391 - 2³ = 13398383 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13398391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13398491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6699195 + 6699196.

It is an arithmetic number, because the mean of its divisors is an integer number (6699196).

Almost surely, 2^13398391 is an apocalyptic number.

13398391 is a deficient number, since it is larger than the sum of its proper divisors (1).

13398391 is an equidigital number, since it uses as much as digits as its factorization.

13398391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 13398391 is about 3660.3812642947. The cubic root of 13398391 is about 237.5112666862.

It can be divided in two parts, 1339 and 8391, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 13398391 in words is "thirteen million, three hundred ninety-eight thousand, three hundred ninety-one".