643273233 has 8 divisors (see below), whose sum is σ = 857877600. Its totient is φ = 428758848.

The previous prime is 643273229. The next prime is 643273247. The reversal of 643273233 is 332372346.

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

It is not a de Polignac number, because 643273233 - 2² = 643273229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643273194 and 643273203.

It is not an unprimeable number, because it can be changed into a prime (643273133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3528 + ... + 36041.

It is an arithmetic number, because the mean of its divisors is an integer number (107234700).

Almost surely, 2^643273233 is an apocalyptic number.

It is an amenable number.

643273233 is a deficient number, since it is larger than the sum of its proper divisors (214604367).

643273233 is a wasteful number, since it uses less digits than its factorization.

643273233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44991.

The product of its digits is 54432, while the sum is 33.

The square root of 643273233 is about 25362.8317228183. The cubic root of 643273233 is about 863.2405382027.

The spelling of 643273233 in words is "six hundred forty-three million, two hundred seventy-three thousand, two hundred thirty-three".