423447923 has 2 divisors, whose sum is σ = 423447924. Its totient is φ = 423447922.

The previous prime is 423447919. The next prime is 423447953. The reversal of 423447923 is 329744324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423447923 - 2² = 423447919 is a prime.

It is not a weakly prime, because it can be changed into another prime (423447953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211723961 + 211723962.

It is an arithmetic number, because the mean of its divisors is an integer number (211723962).

Almost surely, 2^423447923 is an apocalyptic number.

423447923 is a deficient number, since it is larger than the sum of its proper divisors (1).

423447923 is an equidigital number, since it uses as much as digits as its factorization.

423447923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 38.

The square root of 423447923 is about 20577.8503007481. The cubic root of 423447923 is about 750.9309464919.

The spelling of 423447923 in words is "four hundred twenty-three million, four hundred forty-seven thousand, nine hundred twenty-three".