999320039 has 2 divisors, whose sum is σ = 999320040. Its totient is φ = 999320038.

The previous prime is 999320033. The next prime is 999320071. The reversal of 999320039 is 930023999.

It is a weak prime.

It is an emirp because it is prime and its reverse (930023999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999320039 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 (999320033) 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, 499660019 + 499660020.

It is an arithmetic number, because the mean of its divisors is an integer number (499660020).

Almost surely, 2^999320039 is an apocalyptic number.

999320039 is a deficient number, since it is larger than the sum of its proper divisors (1).

999320039 is an equidigital number, since it uses as much as digits as its factorization.

999320039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 44.

The square root of 999320039 is about 31612.0236460749. The cubic root of 999320039 is about 999.7732949420.

The spelling of 999320039 in words is "nine hundred ninety-nine million, three hundred twenty thousand, thirty-nine".