11721473 has 2 divisors, whose sum is σ = 11721474. Its totient is φ = 11721472.

The previous prime is 11721443. The next prime is 11721491. The reversal of 11721473 is 37412711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11242609 + 478864 = 3353^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 11721473 - 2⁸ = 11721217 is a prime.

It is not a weakly prime, because it can be changed into another prime (11721443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860736 + 5860737.

It is an arithmetic number, because the mean of its divisors is an integer number (5860737).

Almost surely, 2^11721473 is an apocalyptic number.

It is an amenable number.

11721473 is a deficient number, since it is larger than the sum of its proper divisors (1).

11721473 is an equidigital number, since it uses as much as digits as its factorization.

11721473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176, while the sum is 26.

The square root of 11721473 is about 3423.6636809126. The cubic root of 11721473 is about 227.1576656993.

The spelling of 11721473 in words is "eleven million, seven hundred twenty-one thousand, four hundred seventy-three".