649039 has 2 divisors, whose sum is σ = 649040. Its totient is φ = 649038.

The previous prime is 649007. The next prime is 649063. The reversal of 649039 is 930946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649039 - 2⁵ = 649007 is a prime.

It is a Chen prime.

649039 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 649039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649069) 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 as a sum of consecutive naturals, namely, 324519 + 324520.

It is an arithmetic number, because the mean of its divisors is an integer number (324520).

2⁶⁴⁹⁰³⁹ is an apocalyptic number.

649039 is a deficient number, since it is larger than the sum of its proper divisors (1).

649039 is an equidigital number, since it uses as much as digits as its factorization.

649039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 649039 is about 805.6295674812. The cubic root of 649039 is about 86.5811994383.

The spelling of 649039 in words is "six hundred forty-nine thousand, thirty-nine".