13896409 has 2 divisors, whose sum is σ = 13896410. Its totient is φ = 13896408.

The previous prime is 13896397. The next prime is 13896419. The reversal of 13896409 is 90469831.

13896409 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7546009 + 6350400 = 2747^2 + 2520^2 .

It is a cyclic number.

It is not a de Polignac number, because 13896409 - 2¹⁷ = 13765337 is a prime.

It is a super-2 number, since 2×13896409² = 386220366190562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13896419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6948204 + 6948205.

It is an arithmetic number, because the mean of its divisors is an integer number (6948205).

Almost surely, 2^13896409 is an apocalyptic number.

It is an amenable number.

13896409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13896409 is an equidigital number, since it uses as much as digits as its factorization.

13896409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 13896409 is about 3727.7887547446. The cubic root of 13896409 is about 240.4183040650.

The spelling of 13896409 in words is "thirteen million, eight hundred ninety-six thousand, four hundred nine".