650609 has 2 divisors, whose sum is σ = 650610. Its totient is φ = 650608.

The previous prime is 650599. The next prime is 650623. The reversal of 650609 is 906056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 10609 = 800^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 650609 - 2¹⁶ = 585073 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 650609.

It is not a weakly prime, because it can be changed into another prime (650669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325304 + 325305.

It is an arithmetic number, because the mean of its divisors is an integer number (325305).

2⁶⁵⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

650609 is a deficient number, since it is larger than the sum of its proper divisors (1).

650609 is an equidigital number, since it uses as much as digits as its factorization.

650609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 650609 is about 806.6033721725. The cubic root of 650609 is about 86.6509554031.

The spelling of 650609 in words is "six hundred fifty thousand, six hundred nine".