649533 has 8 divisors (see below), whose sum is σ = 870048. Its totient is φ = 431024.

The previous prime is 649529. The next prime is 649541. The reversal of 649533 is 335946.

It is a happy number.

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 649533 - 2² = 649529 is a prime.

649533 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 649533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649573) 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, 610 + ... + 1292.

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

2⁶⁴⁹⁵³³ is an apocalyptic number.

It is an amenable number.

649533 is a deficient number, since it is larger than the sum of its proper divisors (220515).

649533 is a wasteful number, since it uses less digits than its factorization.

649533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003.

The product of its digits is 9720, while the sum is 30.

The square root of 649533 is about 805.9361016855. The cubic root of 649533 is about 86.6031602479.

The spelling of 649533 in words is "six hundred forty-nine thousand, five hundred thirty-three".