11640689 has 2 divisors, whose sum is σ = 11640690. Its totient is φ = 11640688.

The previous prime is 11640677. The next prime is 11640719. The reversal of 11640689 is 98604611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7507600 + 4133089 = 2740^2 + 2033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11640689 is a prime.

It is not a weakly prime, because it can be changed into another prime (11640619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5820344 + 5820345.

It is an arithmetic number, because the mean of its divisors is an integer number (5820345).

Almost surely, 2^11640689 is an apocalyptic number.

It is an amenable number.

11640689 is a deficient number, since it is larger than the sum of its proper divisors (1).

11640689 is an equidigital number, since it uses as much as digits as its factorization.

11640689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 11640689 is about 3411.8453950905. The cubic root of 11640689 is about 226.6346078746.

The spelling of 11640689 in words is "eleven million, six hundred forty thousand, six hundred eighty-nine".