423995983 has 2 divisors, whose sum is σ = 423995984. Its totient is φ = 423995982.

The previous prime is 423995981. The next prime is 423995993. The reversal of 423995983 is 389599324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423995983 - 2¹ = 423995981 is a prime.

Together with 423995981, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 423995983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423995981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211997991 + 211997992.

It is an arithmetic number, because the mean of its divisors is an integer number (211997992).

Almost surely, 2^423995983 is an apocalyptic number.

423995983 is a deficient number, since it is larger than the sum of its proper divisors (1).

423995983 is an equidigital number, since it uses as much as digits as its factorization.

423995983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 52.

The square root of 423995983 is about 20591.1627403602. The cubic root of 423995983 is about 751.2547783525.

The spelling of 423995983 in words is "four hundred twenty-three million, nine hundred ninety-five thousand, nine hundred eighty-three".