9769891 has 2 divisors, whose sum is σ = 9769892. Its totient is φ = 9769890.

The previous prime is 9769817. The next prime is 9769909. The reversal of 9769891 is 1989679.

It is a strong prime.

It is an emirp because it is prime and its reverse (1989679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9769891 - 2²¹ = 7672739 is a prime.

It is not a weakly prime, because it can be changed into another prime (9769801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4884945 + 4884946.

It is an arithmetic number, because the mean of its divisors is an integer number (4884946).

Almost surely, 2^9769891 is an apocalyptic number.

9769891 is a deficient number, since it is larger than the sum of its proper divisors (1).

9769891 is an equidigital number, since it uses as much as digits as its factorization.

9769891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 49.

The square root of 9769891 is about 3125.6824854742. The cubic root of 9769891 is about 213.7781131018.

The spelling of 9769891 in words is "nine million, seven hundred sixty-nine thousand, eight hundred ninety-one".