11721349 has 2 divisors, whose sum is σ = 11721350. Its totient is φ = 11721348.

The previous prime is 11721331. The next prime is 11721371. The reversal of 11721349 is 94312711.

11721349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7128900 + 4592449 = 2670^2 + 2143^2 .

It is an emirp because it is prime and its reverse (94312711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11721349 - 2⁷ = 11721221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11721049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860674 + 5860675.

It is an arithmetic number, because the mean of its divisors is an integer number (5860675).

Almost surely, 2^11721349 is an apocalyptic number.

It is an amenable number.

11721349 is a deficient number, since it is larger than the sum of its proper divisors (1).

11721349 is an equidigital number, since it uses as much as digits as its factorization.

11721349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 11721349 is about 3423.6455716093. The cubic root of 11721349 is about 227.1568646723.

The spelling of 11721349 in words is "eleven million, seven hundred twenty-one thousand, three hundred forty-nine".