649559 has 2 divisors, whose sum is σ = 649560. Its totient is φ = 649558.

The previous prime is 649541. The next prime is 649567. The reversal of 649559 is 955946.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649559 is a prime.

It is a Chen 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 649559.

It is not a weakly prime, because it can be changed into another prime (649529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324779 + 324780.

It is an arithmetic number, because the mean of its divisors is an integer number (324780).

2⁶⁴⁹⁵⁵⁹ is an apocalyptic number.

649559 is a deficient number, since it is larger than the sum of its proper divisors (1).

649559 is an equidigital number, since it uses as much as digits as its factorization.

649559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 38.

The square root of 649559 is about 805.9522318351. The cubic root of 649559 is about 86.6043157715.

The spelling of 649559 in words is "six hundred forty-nine thousand, five hundred fifty-nine".