643104213 has 8 divisors (see below), whose sum is σ = 857603808. Its totient is φ = 428670384.

The previous prime is 643104181. The next prime is 643104221. The reversal of 643104213 is 312401346.

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

It is not a de Polignac number, because 643104213 - 2⁵ = 643104181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643104223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14931 + ... + 38847.

It is an arithmetic number, because the mean of its divisors is an integer number (107200476).

Almost surely, 2^643104213 is an apocalyptic number.

It is an amenable number.

643104213 is a deficient number, since it is larger than the sum of its proper divisors (214499595).

643104213 is a wasteful number, since it uses less digits than its factorization.

643104213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32883.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 643104213 is about 25359.4994627260. The cubic root of 643104213 is about 863.1649261149.

Adding to 643104213 its reverse (312401346), we get a palindrome (955505559).

The spelling of 643104213 in words is "six hundred forty-three million, one hundred four thousand, two hundred thirteen".