643675753 has 8 divisors (see below), whose sum is σ = 740143808. Its totient is φ = 548336304.

The previous prime is 643675733. The next prime is 643675757. The reversal of 643675753 is 357576346.

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

It is a cyclic number.

It is not a de Polignac number, because 643675753 - 2²¹ = 641578601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643675757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280926 + ... + 283207.

It is an arithmetic number, because the mean of its divisors is an integer number (92517976).

Almost surely, 2^643675753 is an apocalyptic number.

It is an amenable number.

643675753 is a deficient number, since it is larger than the sum of its proper divisors (96468055).

643675753 is a wasteful number, since it uses less digits than its factorization.

643675753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564303.

The product of its digits is 1587600, while the sum is 46.

The square root of 643675753 is about 25370.7657156815. The cubic root of 643675753 is about 863.4205545698.

The spelling of 643675753 in words is "six hundred forty-three million, six hundred seventy-five thousand, seven hundred fifty-three".