649529 has 2 divisors, whose sum is σ = 649530. Its totient is φ = 649528.

The previous prime is 649511. The next prime is 649541. The reversal of 649529 is 925946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 123904 = 725^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 649529 - 2⁸ = 649273 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649529.

It is not a weakly prime, because it can be changed into another prime (649559) 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, 324764 + 324765.

It is an arithmetic number, because the mean of its divisors is an integer number (324765).

649529 is a Friedman number, since it can be written as 9^5*(9+2)-6-4, using all its digits and the basic arithmetic operations.

2⁶⁴⁹⁵²⁹ is an apocalyptic number.

It is an amenable number.

649529 is a deficient number, since it is larger than the sum of its proper divisors (1).

649529 is an equidigital number, since it uses as much as digits as its factorization.

649529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 649529 is about 805.9336200954. The cubic root of 649529 is about 86.6029824723.

The spelling of 649529 in words is "six hundred forty-nine thousand, five hundred twenty-nine".