643063 has 4 divisors (see below), whose sum is σ = 644680. Its totient is φ = 641448.

The previous prime is 643061. The next prime is 643073. The reversal of 643063 is 360346.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 643063 - 2¹ = 643061 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 (643061) 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, 256 + ... + 1162.

It is an arithmetic number, because the mean of its divisors is an integer number (161170).

2⁶⁴³⁰⁶³ is an apocalyptic number.

643063 is a deficient number, since it is larger than the sum of its proper divisors (1617).

643063 is an equidigital number, since it uses as much as digits as its factorization.

643063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 643063 is about 801.9120899450. The cubic root of 643063 is about 86.3146487229.

The spelling of 643063 in words is "six hundred forty-three thousand, sixty-three".