494593609 has 2 divisors, whose sum is σ = 494593610. Its totient is φ = 494593608.

The previous prime is 494593607. The next prime is 494593651. The reversal of 494593609 is 906395494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352387984 + 142205625 = 18772^2 + 11925^2 .

It is a cyclic number.

It is not a de Polignac number, because 494593609 - 2¹ = 494593607 is a prime.

Together with 494593607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (494593601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247296804 + 247296805.

It is an arithmetic number, because the mean of its divisors is an integer number (247296805).

Almost surely, 2^494593609 is an apocalyptic number.

It is an amenable number.

494593609 is a deficient number, since it is larger than the sum of its proper divisors (1).

494593609 is an equidigital number, since it uses as much as digits as its factorization.

494593609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 494593609 is about 22239.4606274523. The cubic root of 494593609 is about 790.8294492882.

The spelling of 494593609 in words is "four hundred ninety-four million, five hundred ninety-three thousand, six hundred nine".