643034693 has 24 divisors (see below), whose sum is σ = 769374144. Its totient is φ = 535550400.

The previous prime is 643034663. The next prime is 643034699. The reversal of 643034693 is 396430346.

It is not a de Polignac number, because 643034693 - 2²⁴ = 626257477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643034699) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 664496 + ... + 665462.

It is an arithmetic number, because the mean of its divisors is an integer number (32057256).

Almost surely, 2^643034693 is an apocalyptic number.

It is an amenable number.

643034693 is a deficient number, since it is larger than the sum of its proper divisors (126339451).

643034693 is a wasteful number, since it uses less digits than its factorization.

643034693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 38.

The square root of 643034693 is about 25358.1287361666. The cubic root of 643034693 is about 863.1338220902.

The spelling of 643034693 in words is "six hundred forty-three million, thirty-four thousand, six hundred ninety-three".