643474063 has 4 divisors (see below), whose sum is σ = 649721488. Its totient is φ = 637226640.

The previous prime is 643474043. The next prime is 643474079. The reversal of 643474063 is 360474346.

643474063 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 643474063 - 2²⁹ = 106603151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643474043) 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, 3123558 + ... + 3123763.

It is an arithmetic number, because the mean of its divisors is an integer number (162430372).

Almost surely, 2^643474063 is an apocalyptic number.

643474063 is a deficient number, since it is larger than the sum of its proper divisors (6247425).

643474063 is a wasteful number, since it uses less digits than its factorization.

643474063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247424.

The product of its (nonzero) digits is 145152, while the sum is 37.

The square root of 643474063 is about 25366.7905537930. The cubic root of 643474063 is about 863.3303634641.

The spelling of 643474063 in words is "six hundred forty-three million, four hundred seventy-four thousand, sixty-three".