605966909 has 2 divisors, whose sum is σ = 605966910. Its totient is φ = 605966908.

The previous prime is 605966873. The next prime is 605966917. The reversal of 605966909 is 909669506.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404412100 + 201554809 = 20110^2 + 14197^2 .

It is a cyclic number.

It is not a de Polignac number, because 605966909 - 2¹² = 605962813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605966929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302983454 + 302983455.

It is an arithmetic number, because the mean of its divisors is an integer number (302983455).

Almost surely, 2^605966909 is an apocalyptic number.

It is an amenable number.

605966909 is a deficient number, since it is larger than the sum of its proper divisors (1).

605966909 is an equidigital number, since it uses as much as digits as its factorization.

605966909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 50.

The square root of 605966909 is about 24616.3951260131. The cubic root of 605966909 is about 846.2193844284.

The spelling of 605966909 in words is "six hundred five million, nine hundred sixty-six thousand, nine hundred nine".