999994123 has 2 divisors, whose sum is σ = 999994124. Its totient is φ = 999994122.

The previous prime is 999994097. The next prime is 999994129. The reversal of 999994123 is 321499999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999994123 - 2⁵ = 999994091 is a prime.

It is not a weakly prime, because it can be changed into another prime (999994129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499997061 + 499997062.

It is an arithmetic number, because the mean of its divisors is an integer number (499997062).

Almost surely, 2^999994123 is an apocalyptic number.

999994123 is a deficient number, since it is larger than the sum of its proper divisors (1).

999994123 is an equidigital number, since it uses as much as digits as its factorization.

999994123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417176, while the sum is 55.

The square root of 999994123 is about 31622.6836780182. The cubic root of 999994123 is about 999.9980409962.

The spelling of 999994123 in words is "nine hundred ninety-nine million, nine hundred ninety-four thousand, one hundred twenty-three".