643132693 has 12 divisors (see below), whose sum is σ = 780662880. Its totient is φ = 527287992.

The previous prime is 643132673. The next prime is 643132733. The reversal of 643132693 is 396231346.

643132693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 643132693 - 2⁹ = 643132181 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 (643132613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284203 + ... + 286456.

It is an arithmetic number, because the mean of its divisors is an integer number (65055240).

Almost surely, 2^643132693 is an apocalyptic number.

It is an amenable number.

643132693 is a deficient number, since it is larger than the sum of its proper divisors (137530187).

643132693 is a wasteful number, since it uses less digits than its factorization.

643132693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570696 (or 570689 counting only the distinct ones).

The product of its digits is 69984, while the sum is 37.

The square root of 643132693 is about 25360.0609817879. The cubic root of 643132693 is about 863.1776677379.

The spelling of 643132693 in words is "six hundred forty-three million, one hundred thirty-two thousand, six hundred ninety-three".