643323346 has 8 divisors (see below), whose sum is σ = 996113664. Its totient is φ = 311285460.

The previous prime is 643323319. The next prime is 643323353.

643323346 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5188030 + ... + 5188153.

It is an arithmetic number, because the mean of its divisors is an integer number (124514208).

Almost surely, 2^643323346 is an apocalyptic number.

643323346 is a deficient number, since it is larger than the sum of its proper divisors (352790318).

643323346 is a wasteful number, since it uses less digits than its factorization.

643323346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10376216.

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

The square root of 643323346 is about 25363.8196256006. The cubic root of 643323346 is about 863.2629540014.

The spelling of 643323346 in words is "six hundred forty-three million, three hundred twenty-three thousand, three hundred forty-six".