649067 has 4 divisors (see below), whose sum is σ = 651000. Its totient is φ = 647136.

The previous prime is 649063. The next prime is 649069. The reversal of 649067 is 760946.

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

It is a cyclic number.

It is not a de Polignac number, because 649067 - 2² = 649063 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649067.

It is not an unprimeable number, because it can be changed into a prime (649063) 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, 317 + ... + 1182.

It is an arithmetic number, because the mean of its divisors is an integer number (162750).

2⁶⁴⁹⁰⁶⁷ is an apocalyptic number.

649067 is a deficient number, since it is larger than the sum of its proper divisors (1933).

649067 is a wasteful number, since it uses less digits than its factorization.

649067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 649067 is about 805.6469450076. The cubic root of 649067 is about 86.5824444783.

The spelling of 649067 in words is "six hundred forty-nine thousand, sixty-seven".