11647789 has 2 divisors, whose sum is σ = 11647790. Its totient is φ = 11647788.

The previous prime is 11647787. The next prime is 11647793. The reversal of 11647789 is 98774611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9715689 + 1932100 = 3117^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 11647789 - 2¹ = 11647787 is a prime.

Together with 11647787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11647787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5823894 + 5823895.

It is an arithmetic number, because the mean of its divisors is an integer number (5823895).

Almost surely, 2^11647789 is an apocalyptic number.

It is an amenable number.

11647789 is a deficient number, since it is larger than the sum of its proper divisors (1).

11647789 is an equidigital number, since it uses as much as digits as its factorization.

11647789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 11647789 is about 3412.8857291155. The cubic root of 11647789 is about 226.6806755567.

The spelling of 11647789 in words is "eleven million, six hundred forty-seven thousand, seven hundred eighty-nine".