643196 has 12 divisors (see below), whose sum is σ = 1136352. Its totient is φ = 318528.

The previous prime is 643187. The next prime is 643199. The reversal of 643196 is 691346.

643196 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 643196.

It is not an unprimeable number, because it can be changed into a prime (643199) by changing a digit.

643196 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (94696).

2⁶⁴³¹⁹⁶ is an apocalyptic number.

It is an amenable number.

643196 is a deficient number, since it is larger than the sum of its proper divisors (493156).

643196 is a wasteful number, since it uses less digits than its factorization.

643196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1538 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 643196 is about 801.9950124533. The cubic root of 643196 is about 86.3205989211.

The spelling of 643196 in words is "six hundred forty-three thousand, one hundred ninety-six".