649767 has 8 divisors (see below), whose sum is σ = 881280. Its totient is φ = 425720.

The previous prime is 649751. The next prime is 649769. The reversal of 649767 is 767946.

649767 is nontrivially palindromic in base 15.

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

It is a cyclic number.

It is not a de Polignac number, because 649767 - 2⁴ = 649751 is a prime.

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 649767.

It is not an unprimeable number, because it can be changed into a prime (649769) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1659 + ... + 2012.

It is an arithmetic number, because the mean of its divisors is an integer number (110160).

2⁶⁴⁹⁷⁶⁷ is an apocalyptic number.

649767 is a deficient number, since it is larger than the sum of its proper divisors (231513).

649767 is a wasteful number, since it uses less digits than its factorization.

649767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733.

The product of its digits is 63504, while the sum is 39.

The square root of 649767 is about 806.0812614123. The cubic root of 649767 is about 86.6135588504.

The spelling of 649767 in words is "six hundred forty-nine thousand, seven hundred sixty-seven".