11664637 has 2 divisors, whose sum is σ = 11664638. Its totient is φ = 11664636.

The previous prime is 11664619. The next prime is 11664643. The reversal of 11664637 is 73646611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 549081 = 3334^2 + 741^2 .

It is an emirp because it is prime and its reverse (73646611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11664637 - 2²³ = 3276029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11664437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5832318 + 5832319.

It is an arithmetic number, because the mean of its divisors is an integer number (5832319).

Almost surely, 2^11664637 is an apocalyptic number.

It is an amenable number.

11664637 is a deficient number, since it is larger than the sum of its proper divisors (1).

11664637 is an equidigital number, since it uses as much as digits as its factorization.

11664637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 11664637 is about 3415.3531296192. The cubic root of 11664637 is about 226.7899173509.

The spelling of 11664637 in words is "eleven million, six hundred sixty-four thousand, six hundred thirty-seven".