649834 has 8 divisors (see below), whose sum is σ = 984708. Its totient is φ = 321600.

The previous prime is 649829. The next prime is 649843. The reversal of 649834 is 438946.

It can be written as a sum of positive squares in 2 ways, for example, as 485809 + 164025 = 697^2 + 405^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 649834.

It is an unprimeable number.

649834 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 1407 + ... + 1810.

2⁶⁴⁹⁸³⁴ is an apocalyptic number.

649834 is a deficient number, since it is larger than the sum of its proper divisors (334874).

649834 is a wasteful number, since it uses less digits than its factorization.

649834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320.

The product of its digits is 20736, while the sum is 34.

The square root of 649834 is about 806.1228194264. The cubic root of 649834 is about 86.6165357682.

The spelling of 649834 in words is "six hundred forty-nine thousand, eight hundred thirty-four".