3205345009 has 2 divisors, whose sum is σ = 3205345010. Its totient is φ = 3205345008.

The previous prime is 3205345007. The next prime is 3205345043. The reversal of 3205345009 is 9005435023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2107085409 + 1098259600 = 45903^2 + 33140^2 .

It is a cyclic number.

It is not a de Polignac number, because 3205345009 - 2¹ = 3205345007 is a prime.

Together with 3205345007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3205345007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602672504 + 1602672505.

It is an arithmetic number, because the mean of its divisors is an integer number (1602672505).

Almost surely, 2^3205345009 is an apocalyptic number.

It is an amenable number.

3205345009 is a deficient number, since it is larger than the sum of its proper divisors (1).

3205345009 is an equidigital number, since it uses as much as digits as its factorization.

3205345009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 3205345009 is about 56615.7664348015. The cubic root of 3205345009 is about 1474.4326089639.

The spelling of 3205345009 in words is "three billion, two hundred five million, three hundred forty-five thousand, nine".