11209729 has 2 divisors, whose sum is σ = 11209730. Its totient is φ = 11209728.

The previous prime is 11209727. The next prime is 11209733. The reversal of 11209729 is 92790211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11209104 + 625 = 3348^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 11209729 - 2¹ = 11209727 is a prime.

Together with 11209727, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11209729.

It is not a weakly prime, because it can be changed into another prime (11209727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5604864 + 5604865.

It is an arithmetic number, because the mean of its divisors is an integer number (5604865).

Almost surely, 2^11209729 is an apocalyptic number.

It is an amenable number.

11209729 is a deficient number, since it is larger than the sum of its proper divisors (1).

11209729 is an equidigital number, since it uses as much as digits as its factorization.

11209729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 11209729 is about 3348.0933380060. The cubic root of 11209729 is about 223.8025537426.

The spelling of 11209729 in words is "eleven million, two hundred nine thousand, seven hundred twenty-nine".