9809123 has 2 divisors, whose sum is σ = 9809124. Its totient is φ = 9809122.

The previous prime is 9809089. The next prime is 9809131. The reversal of 9809123 is 3219089.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9809123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9809123.

It is not a weakly prime, because it can be changed into another prime (9809143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4904561 + 4904562.

It is an arithmetic number, because the mean of its divisors is an integer number (4904562).

Almost surely, 2^9809123 is an apocalyptic number.

9809123 is a deficient number, since it is larger than the sum of its proper divisors (1).

9809123 is an equidigital number, since it uses as much as digits as its factorization.

9809123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 9809123 is about 3131.9519472687. The cubic root of 9809123 is about 214.0638802511.

The spelling of 9809123 in words is "nine million, eight hundred nine thousand, one hundred twenty-three".