9240991 has 2 divisors, whose sum is σ = 9240992. Its totient is φ = 9240990.

The previous prime is 9240989. The next prime is 9241021. The reversal of 9240991 is 1990429.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9240991 - 2¹ = 9240989 is a prime.

Together with 9240989, 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 (9240961) 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, 4620495 + 4620496.

It is an arithmetic number, because the mean of its divisors is an integer number (4620496).

Almost surely, 2^9240991 is an apocalyptic number.

9240991 is a deficient number, since it is larger than the sum of its proper divisors (1).

9240991 is an equidigital number, since it uses as much as digits as its factorization.

9240991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 9240991 is about 3039.8998338761. The cubic root of 9240991 is about 209.8486513411.

The spelling of 9240991 in words is "nine million, two hundred forty thousand, nine hundred ninety-one".