999930709 has 2 divisors, whose sum is σ = 999930710. Its totient is φ = 999930708.

The previous prime is 999930697. The next prime is 999930731. The reversal of 999930709 is 907039999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 868186225 + 131744484 = 29465^2 + 11478^2 .

It is a cyclic number.

It is not a de Polignac number, because 999930709 - 2⁵ = 999930677 is a prime.

It is a super-2 number, since 2×999930709² = 1999722845602485362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 999930709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999930739) 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, 499965354 + 499965355.

It is an arithmetic number, because the mean of its divisors is an integer number (499965355).

Almost surely, 2^999930709 is an apocalyptic number.

It is an amenable number.

999930709 is a deficient number, since it is larger than the sum of its proper divisors (1).

999930709 is an equidigital number, since it uses as much as digits as its factorization.

999930709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 999930709 is about 31621.6809957978. The cubic root of 999930709 is about 999.9769024665.

The spelling of 999930709 in words is "nine hundred ninety-nine million, nine hundred thirty thousand, seven hundred nine".