13696409 has 2 divisors, whose sum is σ = 13696410. Its totient is φ = 13696408.

The previous prime is 13696367. The next prime is 13696421. The reversal of 13696409 is 90469631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7546009 + 6150400 = 2747^2 + 2480^2 .

It is a cyclic number.

It is not a de Polignac number, because 13696409 - 2¹⁶ = 13630873 is a prime.

It is not a weakly prime, because it can be changed into another prime (13696429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6848204 + 6848205.

It is an arithmetic number, because the mean of its divisors is an integer number (6848205).

Almost surely, 2^13696409 is an apocalyptic number.

It is an amenable number.

13696409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13696409 is an equidigital number, since it uses as much as digits as its factorization.

13696409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 13696409 is about 3700.8659797404. The cubic root of 13696409 is about 239.2593427874.

The spelling of 13696409 in words is "thirteen million, six hundred ninety-six thousand, four hundred nine".