9812123 has 2 divisors, whose sum is σ = 9812124. Its totient is φ = 9812122.

The previous prime is 9812087. The next prime is 9812167. The reversal of 9812123 is 3212189.

9812123 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9812123 - 2¹⁶ = 9746587 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 9812092 and 9812101.

It is not a weakly prime, because it can be changed into another prime (9812183) 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, 4906061 + 4906062.

It is an arithmetic number, because the mean of its divisors is an integer number (4906062).

Almost surely, 2^9812123 is an apocalyptic number.

9812123 is a deficient number, since it is larger than the sum of its proper divisors (1).

9812123 is an equidigital number, since it uses as much as digits as its factorization.

9812123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 9812123 is about 3132.4308452063. The cubic root of 9812123 is about 214.0857009644.

It can be divided in two parts, 98 and 12123, that added together give a palindrome (12221).

The spelling of 9812123 in words is "nine million, eight hundred twelve thousand, one hundred twenty-three".