9491023 has 2 divisors, whose sum is σ = 9491024. Its totient is φ = 9491022.

The previous prime is 9491021. The next prime is 9491029. The reversal of 9491023 is 3201949.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9491023 - 2¹ = 9491021 is a prime.

Together with 9491021, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 9490982 and 9491000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9491021) 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, 4745511 + 4745512.

It is an arithmetic number, because the mean of its divisors is an integer number (4745512).

Almost surely, 2^9491023 is an apocalyptic number.

9491023 is a deficient number, since it is larger than the sum of its proper divisors (1).

9491023 is an equidigital number, since it uses as much as digits as its factorization.

9491023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 9491023 is about 3080.7503956017. The cubic root of 9491023 is about 211.7244476833.

The spelling of 9491023 in words is "nine million, four hundred ninety-one thousand, twenty-three".