643027 has 12 divisors (see below), whose sum is σ = 816696. Its totient is φ = 500640.

The previous prime is 643021. The next prime is 643031. The reversal of 643027 is 720346.

It is not a de Polignac number, because 643027 - 2⁷ = 642899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642989 and 643007.

It is not an unprimeable number, because it can be changed into a prime (643021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58 + ... + 1135.

It is an arithmetic number, because the mean of its divisors is an integer number (68058).

2⁶⁴³⁰²⁷ is an apocalyptic number.

643027 is a deficient number, since it is larger than the sum of its proper divisors (173669).

643027 is a wasteful number, since it uses less digits than its factorization.

643027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 643027 is about 801.8896432802. The cubic root of 643027 is about 86.3130380018.

The spelling of 643027 in words is "six hundred forty-three thousand, twenty-seven".