9797191 has 2 divisors, whose sum is σ = 9797192. Its totient is φ = 9797190.

The previous prime is 9797189. The next prime is 9797231. The reversal of 9797191 is 1917979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9797191 - 2¹ = 9797189 is a prime.

Together with 9797189, 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 (9797171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4898595 + 4898596.

It is an arithmetic number, because the mean of its divisors is an integer number (4898596).

Almost surely, 2^9797191 is an apocalyptic number.

9797191 is a deficient number, since it is larger than the sum of its proper divisors (1).

9797191 is an equidigital number, since it uses as much as digits as its factorization.

9797191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35721, while the sum is 43.

The square root of 9797191 is about 3130.0464852778. The cubic root of 9797191 is about 213.9770479358.

The spelling of 9797191 in words is "nine million, seven hundred ninety-seven thousand, one hundred ninety-one".