13769729 has 2 divisors, whose sum is σ = 13769730. Its totient is φ = 13769728.

The previous prime is 13769719. The next prime is 13769753. The reversal of 13769729 is 92796731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9443329 + 4326400 = 3073^2 + 2080^2 .

It is an emirp because it is prime and its reverse (92796731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13769729 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13769729.

It is not a weakly prime, because it can be changed into another prime (13769719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6884864 + 6884865.

It is an arithmetic number, because the mean of its divisors is an integer number (6884865).

Almost surely, 2^13769729 is an apocalyptic number.

It is an amenable number.

13769729 is a deficient number, since it is larger than the sum of its proper divisors (1).

13769729 is an equidigital number, since it uses as much as digits as its factorization.

13769729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 44.

The square root of 13769729 is about 3710.7585477905. The cubic root of 13769729 is about 239.6855198188.

The spelling of 13769729 in words is "thirteen million, seven hundred sixty-nine thousand, seven hundred twenty-nine".