999983923 has 2 divisors, whose sum is σ = 999983924. Its totient is φ = 999983922.

The previous prime is 999983921. The next prime is 999983947. The reversal of 999983923 is 329389999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999983923 - 2¹ = 999983921 is a prime.

Together with 999983921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (999983921) 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, 499991961 + 499991962.

It is an arithmetic number, because the mean of its divisors is an integer number (499991962).

Almost surely, 2^999983923 is an apocalyptic number.

999983923 is a deficient number, since it is larger than the sum of its proper divisors (1).

999983923 is an equidigital number, since it uses as much as digits as its factorization.

999983923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8503056, while the sum is 61.

The square root of 999983923 is about 31622.5224009724. The cubic root of 999983923 is about 999.9946409713.

The spelling of 999983923 in words is "nine hundred ninety-nine million, nine hundred eighty-three thousand, nine hundred twenty-three".