11722013 has 2 divisors, whose sum is σ = 11722014. Its totient is φ = 11722012.

The previous prime is 11722001. The next prime is 11722033. The reversal of 11722013 is 31022711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11437924 + 284089 = 3382^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 11722013 - 2⁶ = 11721949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11721982 and 11722000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11722033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5861006 + 5861007.

It is an arithmetic number, because the mean of its divisors is an integer number (5861007).

Almost surely, 2^11722013 is an apocalyptic number.

It is an amenable number.

11722013 is a deficient number, since it is larger than the sum of its proper divisors (1).

11722013 is an equidigital number, since it uses as much as digits as its factorization.

11722013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 11722013 is about 3423.7425428907. The cubic root of 11722013 is about 227.1611539769.

Adding to 11722013 its reverse (31022711), we get a palindrome (42744724).

The spelling of 11722013 in words is "eleven million, seven hundred twenty-two thousand, thirteen".