423243805 has 4 divisors (see below), whose sum is σ = 507892572. Its totient is φ = 338595040.

The previous prime is 423243773. The next prime is 423243811. The reversal of 423243805 is 508342324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57592921 + 365650884 = 7589^2 + 19122^2 .

It is not a de Polignac number, because 423243805 - 2⁵ = 423243773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42324376 + ... + 42324385.

It is an arithmetic number, because the mean of its divisors is an integer number (126973143).

Almost surely, 2^423243805 is an apocalyptic number.

It is an amenable number.

423243805 is a deficient number, since it is larger than the sum of its proper divisors (84648767).

423243805 is an equidigital number, since it uses as much as digits as its factorization.

423243805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84648766.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 423243805 is about 20572.8900497718. The cubic root of 423243805 is about 750.8102680095.

The spelling of 423243805 in words is "four hundred twenty-three million, two hundred forty-three thousand, eight hundred five".