643116 has 12 divisors (see below), whose sum is σ = 1500632. Its totient is φ = 214368.

The previous prime is 643099. The next prime is 643121. The reversal of 643116 is 611346.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 643092 and 643101.

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, 26785 + ... + 26808.

2⁶⁴³¹¹⁶ is an apocalyptic number.

It is an amenable number.

643116 is an abundant number, since it is smaller than the sum of its proper divisors (857516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643116 is a wasteful number, since it uses less digits than its factorization.

643116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53600 (or 53598 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 643116 is about 801.9451352805. The cubic root of 643116 is about 86.3170199528.

The spelling of 643116 in words is "six hundred forty-three thousand, one hundred sixteen".