11996681 has 2 divisors, whose sum is σ = 11996682. Its totient is φ = 11996680.

The previous prime is 11996651. The next prime is 11996689. The reversal of 11996681 is 18669911.

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., 8462281 + 3534400 = 2909^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 11996681 - 2⁶ = 11996617 is a prime.

It is a super-2 number, since 2×11996681² = 287840710031522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11996689) 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, 5998340 + 5998341.

It is an arithmetic number, because the mean of its divisors is an integer number (5998341).

Almost surely, 2^11996681 is an apocalyptic number.

It is an amenable number.

11996681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11996681 is an equidigital number, since it uses as much as digits as its factorization.

11996681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 41.

The square root of 11996681 is about 3463.6225256226. The cubic root of 11996681 is about 228.9217393057.

The spelling of 11996681 in words is "eleven million, nine hundred ninety-six thousand, six hundred eighty-one".