609560509 has 2 divisors, whose sum is σ = 609560510. Its totient is φ = 609560508.

The previous prime is 609560491. The next prime is 609560543. The reversal of 609560509 is 905065906.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607376025 + 2184484 = 24645^2 + 1478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609560509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609560569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304780254 + 304780255.

It is an arithmetic number, because the mean of its divisors is an integer number (304780255).

Almost surely, 2^609560509 is an apocalyptic number.

It is an amenable number.

609560509 is a deficient number, since it is larger than the sum of its proper divisors (1).

609560509 is an equidigital number, since it uses as much as digits as its factorization.

609560509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 609560509 is about 24689.2792320878. The cubic root of 609560509 is about 847.8888828276. Note that the first 5 decimals are identical.

The spelling of 609560509 in words is "six hundred nine million, five hundred sixty thousand, five hundred nine".