999818423 has 2 divisors, whose sum is σ = 999818424. Its totient is φ = 999818422.

The previous prime is 999818419. The next prime is 999818453. The reversal of 999818423 is 324818999.

999818423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (324818999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999818423 - 2² = 999818419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999818453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499909211 + 499909212.

It is an arithmetic number, because the mean of its divisors is an integer number (499909212).

Almost surely, 2^999818423 is an apocalyptic number.

999818423 is a deficient number, since it is larger than the sum of its proper divisors (1).

999818423 is an equidigital number, since it uses as much as digits as its factorization.

999818423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 53.

The square root of 999818423 is about 31619.9054868923. The cubic root of 999818423 is about 999.9394706696.

The spelling of 999818423 in words is "nine hundred ninety-nine million, eight hundred eighteen thousand, four hundred twenty-three".