649933 has 8 divisors (see below), whose sum is σ = 694400. Its totient is φ = 606528.

The previous prime is 649921. The next prime is 649937. The reversal of 649933 is 339946.

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 649933 - 2⁹ = 649421 is a prime.

It is a Duffinian number.

649933 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649937) 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, 1285 + ... + 1717.

It is an arithmetic number, because the mean of its divisors is an integer number (86800).

2⁶⁴⁹⁹³³ is an apocalyptic number.

It is an amenable number.

649933 is a deficient number, since it is larger than the sum of its proper divisors (44467).

649933 is a wasteful number, since it uses less digits than its factorization.

649933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531.

The product of its digits is 17496, while the sum is 34.

The square root of 649933 is about 806.1842221230. The cubic root of 649933 is about 86.6209341231.

The spelling of 649933 in words is "six hundred forty-nine thousand, nine hundred thirty-three".