423336643 has 4 divisors (see below), whose sum is σ = 441742608. Its totient is φ = 404930680.

The previous prime is 423336631. The next prime is 423336653. The reversal of 423336643 is 346633324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 423336643 - 2¹⁷ = 423205571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423336599 and 423336608.

It is not an unprimeable number, because it can be changed into a prime (423336653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9202948 + ... + 9202993.

It is an arithmetic number, because the mean of its divisors is an integer number (110435652).

Almost surely, 2^423336643 is an apocalyptic number.

423336643 is a deficient number, since it is larger than the sum of its proper divisors (18405965).

423336643 is a wasteful number, since it uses less digits than its factorization.

423336643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18405964.

The product of its digits is 93312, while the sum is 34.

The square root of 423336643 is about 20575.1462449238. The cubic root of 423336643 is about 750.8651604276.

Adding to 423336643 its reverse (346633324), we get a palindrome (769969967).

The spelling of 423336643 in words is "four hundred twenty-three million, three hundred thirty-six thousand, six hundred forty-three".