11721733 has 2 divisors, whose sum is σ = 11721734. Its totient is φ = 11721732.

The previous prime is 11721691. The next prime is 11721763. The reversal of 11721733 is 33712711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8398404 + 3323329 = 2898^2 + 1823^2 .

It is a cyclic number.

It is not a de Polignac number, because 11721733 - 2⁹ = 11721221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11721698 and 11721707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11721763) 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, 5860866 + 5860867.

It is an arithmetic number, because the mean of its divisors is an integer number (5860867).

Almost surely, 2^11721733 is an apocalyptic number.

It is an amenable number.

11721733 is a deficient number, since it is larger than the sum of its proper divisors (1).

11721733 is an equidigital number, since it uses as much as digits as its factorization.

11721733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882, while the sum is 25.

The square root of 11721733 is about 3423.7016517214. The cubic root of 11721733 is about 227.1593452538.

The spelling of 11721733 in words is "eleven million, seven hundred twenty-one thousand, seven hundred thirty-three".