999973423 has 2 divisors, whose sum is σ = 999973424. Its totient is φ = 999973422.

The previous prime is 999973421. The next prime is 999973451. The reversal of 999973423 is 324379999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999973423 - 2¹ = 999973421 is a prime.

Together with 999973421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999973421) 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, 499986711 + 499986712.

It is an arithmetic number, because the mean of its divisors is an integer number (499986712).

Almost surely, 2^999973423 is an apocalyptic number.

999973423 is a deficient number, since it is larger than the sum of its proper divisors (1).

999973423 is an equidigital number, since it uses as much as digits as its factorization.

999973423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 55.

The square root of 999973423 is about 31622.3563796248. The cubic root of 999973423 is about 999.9911409215.

The spelling of 999973423 in words is "nine hundred ninety-nine million, nine hundred seventy-three thousand, four hundred twenty-three".