643108 has 12 divisors (see below), whose sum is σ = 1151920. Its totient is φ = 313992.

The previous prime is 643099. The next prime is 643121. The reversal of 643108 is 801346.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1698 + ... + 2041.

2⁶⁴³¹⁰⁸ is an apocalyptic number.

It is an amenable number.

643108 is a deficient number, since it is larger than the sum of its proper divisors (508812).

643108 is a wasteful number, since it uses less digits than its factorization.

643108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786 (or 3784 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 643108 is about 801.9401473926. The cubic root of 643108 is about 86.3166620397.

The spelling of 643108 in words is "six hundred forty-three thousand, one hundred eight".