13729817 has 2 divisors, whose sum is σ = 13729818. Its totient is φ = 13729816.

The previous prime is 13729811. The next prime is 13729867. The reversal of 13729817 is 71892731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13719616 + 10201 = 3704^2 + 101^2 .

It is a cyclic number.

It is not a de Polignac number, because 13729817 - 2⁴ = 13729801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13729811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6864908 + 6864909.

It is an arithmetic number, because the mean of its divisors is an integer number (6864909).

Almost surely, 2^13729817 is an apocalyptic number.

It is an amenable number.

13729817 is a deficient number, since it is larger than the sum of its proper divisors (1).

13729817 is an equidigital number, since it uses as much as digits as its factorization.

13729817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 38.

The square root of 13729817 is about 3705.3767689670. The cubic root of 13729817 is about 239.4537169962.

The spelling of 13729817 in words is "thirteen million, seven hundred twenty-nine thousand, eight hundred seventeen".