423364639 has 2 divisors, whose sum is σ = 423364640. Its totient is φ = 423364638.

The previous prime is 423364633. The next prime is 423364663. The reversal of 423364639 is 936463324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423364639 - 2¹¹ = 423362591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423364633) 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, 211682319 + 211682320.

It is an arithmetic number, because the mean of its divisors is an integer number (211682320).

Almost surely, 2^423364639 is an apocalyptic number.

423364639 is a deficient number, since it is larger than the sum of its proper divisors (1).

423364639 is an equidigital number, since it uses as much as digits as its factorization.

423364639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 40.

The square root of 423364639 is about 20575.8265690591. The cubic root of 423364639 is about 750.8817120759.

The spelling of 423364639 in words is "four hundred twenty-three million, three hundred sixty-four thousand, six hundred thirty-nine".