646347 has 8 divisors (see below), whose sum is σ = 928144. Its totient is φ = 397728.

The previous prime is 646339. The next prime is 646379. The reversal of 646347 is 743646.

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

It is not a de Polignac number, because 646347 - 2³ = 646339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646307) 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, 8248 + ... + 8325.

It is an arithmetic number, because the mean of its divisors is an integer number (116018).

2⁶⁴⁶³⁴⁷ is an apocalyptic number.

646347 is a deficient number, since it is larger than the sum of its proper divisors (281797).

646347 is a wasteful number, since it uses less digits than its factorization.

646347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16589.

The product of its digits is 12096, while the sum is 30.

The square root of 646347 is about 803.9570884071. The cubic root of 646347 is about 86.4613301263.

The spelling of 646347 in words is "six hundred forty-six thousand, three hundred forty-seven".