9663791 has 2 divisors, whose sum is σ = 9663792. Its totient is φ = 9663790.

The previous prime is 9663779. The next prime is 9663793. The reversal of 9663791 is 1973669.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1973669) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9663791 - 2⁶ = 9663727 is a prime.

Together with 9663793, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9663793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4831895 + 4831896.

It is an arithmetic number, because the mean of its divisors is an integer number (4831896).

Almost surely, 2^9663791 is an apocalyptic number.

9663791 is a deficient number, since it is larger than the sum of its proper divisors (1).

9663791 is an equidigital number, since it uses as much as digits as its factorization.

9663791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 41.

The square root of 9663791 is about 3108.6638608894. The cubic root of 9663791 is about 213.0014253396.

The spelling of 9663791 in words is "nine million, six hundred sixty-three thousand, seven hundred ninety-one".