646933 has 4 divisors (see below), whose sum is σ = 739360. Its totient is φ = 554508.

The previous prime is 646927. The next prime is 646937. The reversal of 646933 is 339646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 339646 = 2 ⋅169823.

It is a cyclic number.

It is not a de Polignac number, because 646933 - 2⁹ = 646421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646895 and 646904.

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 646933.

It is not an unprimeable number, because it can be changed into a prime (646937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46203 + ... + 46216.

It is an arithmetic number, because the mean of its divisors is an integer number (184840).

2⁶⁴⁶⁹³³ is an apocalyptic number.

It is an amenable number.

646933 is a deficient number, since it is larger than the sum of its proper divisors (92427).

646933 is an equidigital number, since it uses as much as digits as its factorization.

646933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92426.

The product of its digits is 11664, while the sum is 31.

The square root of 646933 is about 804.3214531517. The cubic root of 646933 is about 86.4874518201.

The spelling of 646933 in words is "six hundred forty-six thousand, nine hundred thirty-three".