643535053 has 8 divisors (see below), whose sum is σ = 735671808. Its totient is φ = 551449104.

The previous prime is 643535047. The next prime is 643535069. The reversal of 643535053 is 350535346.

643535053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-643535053 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 (643535083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20100 + ... + 41122.

It is an arithmetic number, because the mean of its divisors is an integer number (91958976).

Almost surely, 2^643535053 is an apocalyptic number.

It is an amenable number.

643535053 is a deficient number, since it is larger than the sum of its proper divisors (92136755).

643535053 is a wasteful number, since it uses less digits than its factorization.

643535053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25403.

The product of its (nonzero) digits is 81000, while the sum is 34.

The square root of 643535053 is about 25367.9926876369. The cubic root of 643535053 is about 863.3576387698.

The spelling of 643535053 in words is "six hundred forty-three million, five hundred thirty-five thousand, fifty-three".