649463 has 4 divisors (see below), whose sum is σ = 653520. Its totient is φ = 645408.

The previous prime is 649457. The next prime is 649469. The reversal of 649463 is 364946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364946 = 2 ⋅182473.

It is an interprime number because it is at equal distance from previous prime (649457) and next prime (649469).

It is a cyclic number.

It is not a de Polignac number, because 649463 - 2¹² = 645367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (163380).

2⁶⁴⁹⁴⁶³ is an apocalyptic number.

649463 is a deficient number, since it is larger than the sum of its proper divisors (4057).

649463 is a wasteful number, since it uses less digits than its factorization.

649463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056.

The product of its digits is 15552, while the sum is 32.

The square root of 649463 is about 805.8926727549. The cubic root of 649463 is about 86.6000490695.

The spelling of 649463 in words is "six hundred forty-nine thousand, four hundred sixty-three".