423243013 has 2 divisors, whose sum is σ = 423243014. Its totient is φ = 423243012.

The previous prime is 423242983. The next prime is 423243019. The reversal of 423243013 is 310342324.

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., 408969729 + 14273284 = 20223^2 + 3778^2 .

It is a cyclic number.

It is not a de Polignac number, because 423243013 - 2¹³ = 423234821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423243019) by changing a digit.

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 as a sum of consecutive naturals, namely, 211621506 + 211621507.

It is an arithmetic number, because the mean of its divisors is an integer number (211621507).

Almost surely, 2^423243013 is an apocalyptic number.

It is an amenable number.

423243013 is a deficient number, since it is larger than the sum of its proper divisors (1).

423243013 is an equidigital number, since it uses as much as digits as its factorization.

423243013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 423243013 is about 20572.8708011303. The cubic root of 423243013 is about 750.8097996883.

Adding to 423243013 its reverse (310342324), we get a palindrome (733585337).

The spelling of 423243013 in words is "four hundred twenty-three million, two hundred forty-three thousand, thirteen".