649511 has 2 divisors, whose sum is σ = 649512. Its totient is φ = 649510.

The previous prime is 649507. The next prime is 649529. The reversal of 649511 is 115946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649511 - 2² = 649507 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649501) 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 as a sum of consecutive naturals, namely, 324755 + 324756.

It is an arithmetic number, because the mean of its divisors is an integer number (324756).

2⁶⁴⁹⁵¹¹ is an apocalyptic number.

649511 is a deficient number, since it is larger than the sum of its proper divisors (1).

649511 is an equidigital number, since it uses as much as digits as its factorization.

649511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 649511 is about 805.9224528452. The cubic root of 649511 is about 86.6021824730.

The spelling of 649511 in words is "six hundred forty-nine thousand, five hundred eleven".