649479 has 4 divisors (see below), whose sum is σ = 865976. Its totient is φ = 432984.

The previous prime is 649471. The next prime is 649483. The reversal of 649479 is 974946.

649479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 649479 - 2³ = 649471 is a prime.

It is a d-powerful number, because it can be written as 6² + 4² + 4⁴ + 9² + 7⁶ + 9⁶ .

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649479.

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 3 ways as a sum of consecutive naturals, for example, 108244 + ... + 108249.

It is an arithmetic number, because the mean of its divisors is an integer number (216494).

2⁶⁴⁹⁴⁷⁹ is an apocalyptic number.

649479 is a deficient number, since it is larger than the sum of its proper divisors (216497).

649479 is a wasteful number, since it uses less digits than its factorization.

649479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216496.

The product of its digits is 54432, while the sum is 39.

The square root of 649479 is about 805.9025995739. The cubic root of 649479 is about 86.6007602157.

It can be divided in two parts, 649 and 479, that added together give a triangular number (1128 = T₄₇).

The spelling of 649479 in words is "six hundred forty-nine thousand, four hundred seventy-nine".