996999923 has 2 divisors, whose sum is σ = 996999924. Its totient is φ = 996999922.

The previous prime is 996999919. The next prime is 996999937. The reversal of 996999923 is 329999699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 996999923 - 2² = 996999919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 996999923.

It is not a weakly prime, because it can be changed into another prime (996999953) 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, 498499961 + 498499962.

It is an arithmetic number, because the mean of its divisors is an integer number (498499962).

Almost surely, 2^996999923 is an apocalyptic number.

996999923 is a deficient number, since it is larger than the sum of its proper divisors (1).

996999923 is an equidigital number, since it uses as much as digits as its factorization.

996999923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19131876, while the sum is 65.

The square root of 996999923 is about 31575.3055883866. The cubic root of 996999923 is about 998.9989726119.

The spelling of 996999923 in words is "nine hundred ninety-six million, nine hundred ninety-nine thousand, nine hundred twenty-three".