643067 has 4 divisors (see below), whose sum is σ = 649536. Its totient is φ = 636600.

The previous prime is 643061. The next prime is 643073. The reversal of 643067 is 760346.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (643061) and next prime (643073).

It is a cyclic number.

It is not a de Polignac number, because 643067 - 2⁴ = 643051 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 643067.

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, 3083 + ... + 3284.

It is an arithmetic number, because the mean of its divisors is an integer number (162384).

2⁶⁴³⁰⁶⁷ is an apocalyptic number.

643067 is a deficient number, since it is larger than the sum of its proper divisors (6469).

643067 is a wasteful number, since it uses less digits than its factorization.

643067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6468.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 643067 is about 801.9145839801. The cubic root of 643067 is about 86.3148276882.

The spelling of 643067 in words is "six hundred forty-three thousand, sixty-seven".