424663391 has 2 divisors, whose sum is σ = 424663392. Its totient is φ = 424663390.

The previous prime is 424663387. The next prime is 424663423. The reversal of 424663391 is 193366424.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 424663391 - 2² = 424663387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424663301) 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, 212331695 + 212331696.

It is an arithmetic number, because the mean of its divisors is an integer number (212331696).

Almost surely, 2^424663391 is an apocalyptic number.

424663391 is a deficient number, since it is larger than the sum of its proper divisors (1).

424663391 is an equidigital number, since it uses as much as digits as its factorization.

424663391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 38.

The square root of 424663391 is about 20607.3625435183. The cubic root of 424663391 is about 751.6487526820.

The spelling of 424663391 in words is "four hundred twenty-four million, six hundred sixty-three thousand, three hundred ninety-one".