13400389 has 2 divisors, whose sum is σ = 13400390. Its totient is φ = 13400388.

The previous prime is 13400371. The next prime is 13400417. The reversal of 13400389 is 98300431.

13400389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (13400417) can be obtained adding 13400389 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12837889 + 562500 = 3583^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 13400389 - 2⁹ = 13399877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13400089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6700194 + 6700195.

It is an arithmetic number, because the mean of its divisors is an integer number (6700195).

Almost surely, 2^13400389 is an apocalyptic number.

It is an amenable number.

13400389 is a deficient number, since it is larger than the sum of its proper divisors (1).

13400389 is an equidigital number, since it uses as much as digits as its factorization.

13400389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13400389 is about 3660.6541765100. The cubic root of 13400389 is about 237.5230721815.

The spelling of 13400389 in words is "thirteen million, four hundred thousand, three hundred eighty-nine".