643354 has 8 divisors (see below), whose sum is σ = 969408. Its totient is φ = 320220.

The previous prime is 643303. The next prime is 643369. The reversal of 643354 is 453346.

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

It is a nialpdrome in base 15.

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, 52 + ... + 1135.

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

2⁶⁴³³⁵⁴ is an apocalyptic number.

643354 is a deficient number, since it is larger than the sum of its proper divisors (326054).

643354 is a wasteful number, since it uses less digits than its factorization.

643354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460.

The product of its digits is 4320, while the sum is 25.

The square root of 643354 is about 802.0935107579. The cubic root of 643354 is about 86.3276665117.

The spelling of 643354 in words is "six hundred forty-three thousand, three hundred fifty-four".