649473 has 8 divisors (see below), whose sum is σ = 944736. Its totient is φ = 393600.

The previous prime is 649471. The next prime is 649483. The reversal of 649473 is 374946.

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

It is not a de Polignac number, because 649473 - 2¹ = 649471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 19681 = 649473 / (6 + 4 + 9 + 4 + 7 + 3).

It is a d-powerful number, because it can be written as 6² + 4³ + 4⁴ + 9⁶ + 7⁶ + 3³ .

649473 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649473.

It is not an unprimeable number, because it can be changed into a prime (649471) 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, 9808 + ... + 9873.

It is an arithmetic number, because the mean of its divisors is an integer number (118092).

2⁶⁴⁹⁴⁷³ is an apocalyptic number.

It is an amenable number.

649473 is a deficient number, since it is larger than the sum of its proper divisors (295263).

649473 is a wasteful number, since it uses less digits than its factorization.

649473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19695.

The product of its digits is 18144, while the sum is 33.

The square root of 649473 is about 805.8988770311. The cubic root of 649473 is about 86.6004935373.

The spelling of 649473 in words is "six hundred forty-nine thousand, four hundred seventy-three".