999994439 has 2 divisors, whose sum is σ = 999994440. Its totient is φ = 999994438.

The previous prime is 999994433. The next prime is 999994487. The reversal of 999994439 is 934499999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999994439 - 2⁴ = 999994423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999994433) 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, 499997219 + 499997220.

It is an arithmetic number, because the mean of its divisors is an integer number (499997220).

Almost surely, 2^999994439 is an apocalyptic number.

999994439 is a deficient number, since it is larger than the sum of its proper divisors (1).

999994439 is an equidigital number, since it uses as much as digits as its factorization.

999994439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25509168, while the sum is 65.

The square root of 999994439 is about 31622.6886744312. The cubic root of 999994439 is about 999.9981463299.

The spelling of 999994439 in words is "nine hundred ninety-nine million, nine hundred ninety-four thousand, four hundred thirty-nine".