643060211 has 4 divisors (see below), whose sum is σ = 643353792. Its totient is φ = 642766632.

The previous prime is 643060169. The next prime is 643060213. The reversal of 643060211 is 112060346.

It is a happy number.

643060211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 643060211 - 2¹⁴ = 643043827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643060213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143480 + ... + 147893.

It is an arithmetic number, because the mean of its divisors is an integer number (160838448).

Almost surely, 2^643060211 is an apocalyptic number.

643060211 is a deficient number, since it is larger than the sum of its proper divisors (293581).

643060211 is a wasteful number, since it uses less digits than its factorization.

643060211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293580.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 643060211 is about 25358.6318834436. The cubic root of 643060211 is about 863.1452393889.

The spelling of 643060211 in words is "six hundred forty-three million, sixty thousand, two hundred eleven".