9999974123 has 2 divisors, whose sum is σ = 9999974124. Its totient is φ = 9999974122.

The previous prime is 9999974111. The next prime is 9999974161. The reversal of 9999974123 is 3214799999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9999974123 - 2¹⁶ = 9999908587 is a prime.

It is not a weakly prime, because it can be changed into another prime (9999974323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999987061 + 4999987062.

It is an arithmetic number, because the mean of its divisors is an integer number (4999987062).

Almost surely, 2^9999974123 is an apocalyptic number.

9999974123 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999974123 is an equidigital number, since it uses as much as digits as its factorization.

9999974123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9920232, while the sum is 62.

The square root of 9999974123 is about 99999.8706149163. The cubic root of 9999974123 is about 2154.4328316867.

The spelling of 9999974123 in words is "nine billion, nine hundred ninety-nine million, nine hundred seventy-four thousand, one hundred twenty-three".