13889389 has 2 divisors, whose sum is σ = 13889390. Its totient is φ = 13889388.

The previous prime is 13889383. The next prime is 13889411. The reversal of 13889389 is 98398831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 324900 = 3683^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 13889389 - 2⁷ = 13889261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13889383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944694 + 6944695.

It is an arithmetic number, because the mean of its divisors is an integer number (6944695).

Almost surely, 2^13889389 is an apocalyptic number.

It is an amenable number.

13889389 is a deficient number, since it is larger than the sum of its proper divisors (1).

13889389 is an equidigital number, since it uses as much as digits as its factorization.

13889389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 49.

The square root of 13889389 is about 3726.8470588421. The cubic root of 13889389 is about 240.3778134901.

The spelling of 13889389 in words is "thirteen million, eight hundred eighty-nine thousand, three hundred eighty-nine".