643034 has 16 divisors (see below), whose sum is σ = 1150848. Its totient is φ = 263472.

The previous prime is 643031. The next prime is 643039. The reversal of 643034 is 430346.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642997 and 643015.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 643034.

It is not an unprimeable number, because it can be changed into a prime (643031) 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 7 ways as a sum of consecutive naturals, for example, 677 + ... + 1320.

It is an arithmetic number, because the mean of its divisors is an integer number (71928).

2⁶⁴³⁰³⁴ is an apocalyptic number.

643034 is a deficient number, since it is larger than the sum of its proper divisors (507814).

643034 is a wasteful number, since it uses less digits than its factorization.

643034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 643034 is about 801.8940079587. The cubic root of 643034 is about 86.3133512023.

The spelling of 643034 in words is "six hundred forty-three thousand, thirty-four".