11696821 has 2 divisors, whose sum is σ = 11696822. Its totient is φ = 11696820.

The previous prime is 11696807. The next prime is 11696887. The reversal of 11696821 is 12869611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11662225 + 34596 = 3415^2 + 186^2 .

It is a cyclic number.

It is not a de Polignac number, because 11696821 - 2⁷ = 11696693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11696801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5848410 + 5848411.

It is an arithmetic number, because the mean of its divisors is an integer number (5848411).

Almost surely, 2^11696821 is an apocalyptic number.

It is an amenable number.

11696821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11696821 is an equidigital number, since it uses as much as digits as its factorization.

11696821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 11696821 is about 3420.0615491538. The cubic root of 11696821 is about 226.9983051488.

The spelling of 11696821 in words is "eleven million, six hundred ninety-six thousand, eight hundred twenty-one".