13867409 has 2 divisors, whose sum is σ = 13867410. Its totient is φ = 13867408.

The previous prime is 13867379. The next prime is 13867417. The reversal of 13867409 is 90476831.

13867409 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 can be written as a sum of positive squares in only one way, i.e., 12229009 + 1638400 = 3497^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 13867409 - 2¹⁶ = 13801873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13867429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6933704 + 6933705.

It is an arithmetic number, because the mean of its divisors is an integer number (6933705).

Almost surely, 2^13867409 is an apocalyptic number.

It is an amenable number.

13867409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13867409 is an equidigital number, since it uses as much as digits as its factorization.

13867409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 13867409 is about 3723.8970179101. The cubic root of 13867409 is about 240.2509470060.

The spelling of 13867409 in words is "thirteen million, eight hundred sixty-seven thousand, four hundred nine".