9228391 has 2 divisors, whose sum is σ = 9228392. Its totient is φ = 9228390.

The previous prime is 9228389. The next prime is 9228397. The reversal of 9228391 is 1938229.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9228391 - 2¹ = 9228389 is a prime.

Together with 9228389, 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 (9228397) 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, 4614195 + 4614196.

It is an arithmetic number, because the mean of its divisors is an integer number (4614196).

Almost surely, 2^9228391 is an apocalyptic number.

9228391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9228391 is an equidigital number, since it uses as much as digits as its factorization.

9228391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 9228391 is about 3037.8266902508. The cubic root of 9228391 is about 209.7532324389.

The spelling of 9228391 in words is "nine million, two hundred twenty-eight thousand, three hundred ninety-one".