646473 has 8 divisors (see below), whose sum is σ = 870048. Its totient is φ = 426944.

The previous prime is 646453. The next prime is 646519. The reversal of 646473 is 374646.

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 646473 - 2¹⁷ = 515401 is a prime.

It is a Curzon number.

646473 is a lucky number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 646473.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646473.

It is not an unprimeable number, because it can be changed into a prime (646403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615 + ... + 1292.

It is an arithmetic number, because the mean of its divisors is an integer number (108756).

2⁶⁴⁶⁴⁷³ is an apocalyptic number.

It is an amenable number.

646473 is a deficient number, since it is larger than the sum of its proper divisors (223575).

646473 is a wasteful number, since it uses less digits than its factorization.

646473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023.

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

The square root of 646473 is about 804.0354469798. The cubic root of 646473 is about 86.4669480682.

The spelling of 646473 in words is "six hundred forty-six thousand, four hundred seventy-three".