649223 has 8 divisors (see below), whose sum is σ = 684480. Its totient is φ = 614880.

The previous prime is 649217. The next prime is 649261. The reversal of 649223 is 322946.

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

It is not a de Polignac number, because 649223 - 2¹⁰ = 648199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649192 and 649201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649273) 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, 1586 + ... + 1952.

It is an arithmetic number, because the mean of its divisors is an integer number (85560).

2⁶⁴⁹²²³ is an apocalyptic number.

649223 is a deficient number, since it is larger than the sum of its proper divisors (35257).

649223 is a wasteful number, since it uses less digits than its factorization.

649223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457.

The product of its digits is 2592, while the sum is 26.

The square root of 649223 is about 805.7437557934. The cubic root of 649223 is about 86.5893804749.

The spelling of 649223 in words is "six hundred forty-nine thousand, two hundred twenty-three".