423421013 has 2 divisors, whose sum is σ = 423421014. Its totient is φ = 423421012.

The previous prime is 423421003. The next prime is 423421049. The reversal of 423421013 is 310124324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246584209 + 176836804 = 15703^2 + 13298^2 .

It is a cyclic number.

It is not a de Polignac number, because 423421013 - 2⁴ = 423420997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423421003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211710506 + 211710507.

It is an arithmetic number, because the mean of its divisors is an integer number (211710507).

Almost surely, 2^423421013 is an apocalyptic number.

It is an amenable number.

423421013 is a deficient number, since it is larger than the sum of its proper divisors (1).

423421013 is an equidigital number, since it uses as much as digits as its factorization.

423421013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 423421013 is about 20577.1964319729. The cubic root of 423421013 is about 750.9150390027.

Adding to 423421013 its reverse (310124324), we get a palindrome (733545337).

The spelling of 423421013 in words is "four hundred twenty-three million, four hundred twenty-one thousand, thirteen".