423444451 has 2 divisors, whose sum is σ = 423444452. Its totient is φ = 423444450.

The previous prime is 423444443. The next prime is 423444499. The reversal of 423444451 is 154444324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423444451 - 2³ = 423444443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (423444851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211722225 + 211722226.

It is an arithmetic number, because the mean of its divisors is an integer number (211722226).

Almost surely, 2^423444451 is an apocalyptic number.

423444451 is a deficient number, since it is larger than the sum of its proper divisors (1).

423444451 is an equidigital number, since it uses as much as digits as its factorization.

423444451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 31.

The square root of 423444451 is about 20577.7659380216. The cubic root of 423444451 is about 750.9288941031.

Adding to 423444451 its reverse (154444324), we get a palindrome (577888775).

The spelling of 423444451 in words is "four hundred twenty-three million, four hundred forty-four thousand, four hundred fifty-one".