423243841 has 2 divisors, whose sum is σ = 423243842. Its totient is φ = 423243840.

The previous prime is 423243811. The next prime is 423243857. The reversal of 423243841 is 148342324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372335616 + 50908225 = 19296^2 + 7135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423243841 is a prime.

It is not a weakly prime, because it can be changed into another prime (423243811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211621920 + 211621921.

It is an arithmetic number, because the mean of its divisors is an integer number (211621921).

Almost surely, 2^423243841 is an apocalyptic number.

It is an amenable number.

423243841 is a deficient number, since it is larger than the sum of its proper divisors (1).

423243841 is an equidigital number, since it uses as much as digits as its factorization.

423243841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 31.

The square root of 423243841 is about 20572.8909247096. The cubic root of 423243841 is about 750.8102892968.

The spelling of 423243841 in words is "four hundred twenty-three million, two hundred forty-three thousand, eight hundred forty-one".