999689683 has 2 divisors, whose sum is σ = 999689684. Its totient is φ = 999689682.

The previous prime is 999689681. The next prime is 999689729. The reversal of 999689683 is 386986999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999689683 - 2¹ = 999689681 is a prime.

Together with 999689681, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (999689681) 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, 499844841 + 499844842.

It is an arithmetic number, because the mean of its divisors is an integer number (499844842).

Almost surely, 2^999689683 is an apocalyptic number.

999689683 is a deficient number, since it is larger than the sum of its proper divisors (1).

999689683 is an equidigital number, since it uses as much as digits as its factorization.

999689683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45349632, while the sum is 67.

The square root of 999689683 is about 31617.8696783955. The cubic root of 999689683 is about 999.8965502985.

The spelling of 999689683 in words is "nine hundred ninety-nine million, six hundred eighty-nine thousand, six hundred eighty-three".