423541643 has 6 divisors (see below), whose sum is σ = 492691356. Its totient is φ = 363035652.

The previous prime is 423541637. The next prime is 423541661. The reversal of 423541643 is 346145324.

It is not a de Polignac number, because 423541643 - 2⁶ = 423541579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423541633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4321805 + ... + 4321902.

It is an arithmetic number, because the mean of its divisors is an integer number (82115226).

Almost surely, 2^423541643 is an apocalyptic number.

423541643 is a deficient number, since it is larger than the sum of its proper divisors (69149713).

423541643 is an equidigital number, since it uses as much as digits as its factorization.

423541643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8643721 (or 8643714 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 423541643 is about 20580.1273805582. The cubic root of 423541643 is about 750.9863425654.

Adding to 423541643 its reverse (346145324), we get a palindrome (769686967).

The spelling of 423541643 in words is "four hundred twenty-three million, five hundred forty-one thousand, six hundred forty-three".