643298 has 8 divisors (see below), whose sum is σ = 969408. Its totient is φ = 320164.

The previous prime is 643273. The next prime is 643301. The reversal of 643298 is 892346.

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

It is a d-powerful number, because it can be written as 6⁶ + 4⁶ + 2¹¹ + 3¹² + 9⁵ + 8 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86 + ... + 1137.

It is an arithmetic number, because the mean of its divisors is an integer number (121176).

2⁶⁴³²⁹⁸ is an apocalyptic number.

643298 is a deficient number, since it is larger than the sum of its proper divisors (326110).

643298 is a wasteful number, since it uses less digits than its factorization.

643298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488.

The product of its digits is 10368, while the sum is 32.

The square root of 643298 is about 802.0586013503. The cubic root of 643298 is about 86.3251616753.

The spelling of 643298 in words is "six hundred forty-three thousand, two hundred ninety-eight".