1650506009 has 2 divisors, whose sum is σ = 1650506010. Its totient is φ = 1650506008.

The previous prime is 1650505949. The next prime is 1650506071. The reversal of 1650506009 is 9006050561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1572360409 + 78145600 = 39653^2 + 8840^2 .

It is an emirp because it is prime and its reverse (9006050561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1650506009 - 2²⁴ = 1633728793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1650506089) 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, 825253004 + 825253005.

It is an arithmetic number, because the mean of its divisors is an integer number (825253005).

Almost surely, 2^1650506009 is an apocalyptic number.

It is an amenable number.

1650506009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650506009 is an equidigital number, since it uses as much as digits as its factorization.

1650506009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 1650506009 is about 40626.4200859490. The cubic root of 1650506009 is about 1181.7865327689.

The spelling of 1650506009 in words is "one billion, six hundred fifty million, five hundred six thousand, nine".