11921713 has 2 divisors, whose sum is σ = 11921714. Its totient is φ = 11921712.

The previous prime is 11921699. The next prime is 11921719. The reversal of 11921713 is 31712911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7354944 + 4566769 = 2712^2 + 2137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11921713 is a prime.

It is not a weakly prime, because it can be changed into another prime (11921719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5960856 + 5960857.

It is an arithmetic number, because the mean of its divisors is an integer number (5960857).

Almost surely, 2^11921713 is an apocalyptic number.

It is an amenable number.

11921713 is a deficient number, since it is larger than the sum of its proper divisors (1).

11921713 is an equidigital number, since it uses as much as digits as its factorization.

11921713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 25.

The square root of 11921713 is about 3452.7833699785. The cubic root of 11921713 is about 228.4438938646.

The spelling of 11921713 in words is "eleven million, nine hundred twenty-one thousand, seven hundred thirteen".