1650552209 has 2 divisors, whose sum is σ = 1650552210. Its totient is φ = 1650552208.

The previous prime is 1650552161. The next prime is 1650552221. The reversal of 1650552209 is 9022550561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1635959809 + 14592400 = 40447^2 + 3820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1650552209 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 (1650552269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825276104 + 825276105.

It is an arithmetic number, because the mean of its divisors is an integer number (825276105).

Almost surely, 2^1650552209 is an apocalyptic number.

It is an amenable number.

1650552209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650552209 is an equidigital number, since it uses as much as digits as its factorization.

1650552209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1650552209 is about 40626.9886774789. The cubic root of 1650552209 is about 1181.7975592921.

The spelling of 1650552209 in words is "one billion, six hundred fifty million, five hundred fifty-two thousand, two hundred nine".