245608609 has 2 divisors, whose sum is σ = 245608610. Its totient is φ = 245608608.

The previous prime is 245608607. The next prime is 245608679. The reversal of 245608609 is 906806542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132250000 + 113358609 = 11500^2 + 10647^2 .

It is a cyclic number.

It is not a de Polignac number, because 245608609 - 2¹ = 245608607 is a prime.

Together with 245608607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (245608607) 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, 122804304 + 122804305.

It is an arithmetic number, because the mean of its divisors is an integer number (122804305).

Almost surely, 2^245608609 is an apocalyptic number.

It is an amenable number.

245608609 is a deficient number, since it is larger than the sum of its proper divisors (1).

245608609 is an equidigital number, since it uses as much as digits as its factorization.

245608609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 245608609 is about 15671.9050852154. The cubic root of 245608609 is about 626.2501773034.

The spelling of 245608609 in words is "two hundred forty-five million, six hundred eight thousand, six hundred nine".