9689891 has 2 divisors, whose sum is σ = 9689892. Its totient is φ = 9689890.

The previous prime is 9689767. The next prime is 9689929. The reversal of 9689891 is 1989869.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9689891 - 2¹⁰ = 9688867 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (9689591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844945 + 4844946.

It is an arithmetic number, because the mean of its divisors is an integer number (4844946).

Almost surely, 2^9689891 is an apocalyptic number.

9689891 is a deficient number, since it is larger than the sum of its proper divisors (1).

9689891 is an equidigital number, since it uses as much as digits as its factorization.

9689891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 50.

The square root of 9689891 is about 3112.8589752830. The cubic root of 9689891 is about 213.1930112919.

The spelling of 9689891 in words is "nine million, six hundred eighty-nine thousand, eight hundred ninety-one".