704243609 has 4 divisors (see below), whose sum is σ = 711216420. Its totient is φ = 697270800.

The previous prime is 704243599. The next prime is 704243623. The reversal of 704243609 is 906342407.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 433805584 + 270438025 = 20828^2 + 16445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-704243609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (704243689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3486254 + ... + 3486455.

It is an arithmetic number, because the mean of its divisors is an integer number (177804105).

Almost surely, 2^704243609 is an apocalyptic number.

It is an amenable number.

704243609 is a deficient number, since it is larger than the sum of its proper divisors (6972811).

704243609 is a wasteful number, since it uses less digits than its factorization.

704243609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6972810.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 704243609 is about 26537.5886055987. The cubic root of 704243609 is about 889.6946345395.

The spelling of 704243609 in words is "seven hundred four million, two hundred forty-three thousand, six hundred nine".