643367 has 8 divisors (see below), whose sum is σ = 669600. Its totient is φ = 617760.

The previous prime is 643303. The next prime is 643369. The reversal of 643367 is 763346.

643367 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 643367 - 2⁶ = 643303 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

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 643367.

It is not an unprimeable number, because it can be changed into a prime (643369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3134 + ... + 3332.

It is an arithmetic number, because the mean of its divisors is an integer number (83700).

2⁶⁴³³⁶⁷ is an apocalyptic number.

643367 is a deficient number, since it is larger than the sum of its proper divisors (26233).

643367 is a wasteful number, since it uses less digits than its factorization.

643367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

The product of its digits is 9072, while the sum is 29.

The square root of 643367 is about 802.1016145103. The cubic root of 643367 is about 86.3282479708.

The spelling of 643367 in words is "six hundred forty-three thousand, three hundred sixty-seven".