999960839 has 2 divisors, whose sum is σ = 999960840. Its totient is φ = 999960838.

The previous prime is 999960781. The next prime is 999960889. The reversal of 999960839 is 938069999.

999960839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999960839 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 (999960889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499980419 + 499980420.

It is an arithmetic number, because the mean of its divisors is an integer number (499980420).

Almost surely, 2^999960839 is an apocalyptic number.

999960839 is a deficient number, since it is larger than the sum of its proper divisors (1).

999960839 is an equidigital number, since it uses as much as digits as its factorization.

999960839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The square root of 999960839 is about 31622.1574058444. The cubic root of 999960839 is about 999.9869461629.

The spelling of 999960839 in words is "nine hundred ninety-nine million, nine hundred sixty thousand, eight hundred thirty-nine".