643029 has 8 divisors (see below), whose sum is σ = 866112. Its totient is φ = 424320.

The previous prime is 643021. The next prime is 643031. The reversal of 643029 is 920346.

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

It is not a de Polignac number, because 643029 - 2³ = 643021 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 643029.

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 7 ways as a sum of consecutive naturals, for example, 732 + ... + 1349.

It is an arithmetic number, because the mean of its divisors is an integer number (108264).

2⁶⁴³⁰²⁹ is an apocalyptic number.

It is an amenable number.

643029 is a deficient number, since it is larger than the sum of its proper divisors (223083).

643029 is a wasteful number, since it uses less digits than its factorization.

643029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 643029 is about 801.8908903336. The cubic root of 643029 is about 86.3131274879.

The spelling of 643029 in words is "six hundred forty-three thousand, twenty-nine".