674730809 has 4 divisors (see below), whose sum is σ = 691187700. Its totient is φ = 658273920.

The previous prime is 674730787. The next prime is 674730851. The reversal of 674730809 is 908037476.

674730809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8832784 + 665898025 = 2972^2 + 25805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674730809 is a prime.

It is a super-2 number, since 2×674730809² = 910523329227588962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 674730809.

It is not an unprimeable number, because it can be changed into a prime (674730899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8228384 + ... + 8228465.

It is an arithmetic number, because the mean of its divisors is an integer number (172796925).

Almost surely, 2^674730809 is an apocalyptic number.

It is an amenable number.

674730809 is a deficient number, since it is larger than the sum of its proper divisors (16456891).

674730809 is a wasteful number, since it uses less digits than its factorization.

674730809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16456890.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 674730809 is about 25975.5810137136. The cubic root of 674730809 is about 877.0886956984.

The spelling of 674730809 in words is "six hundred seventy-four million, seven hundred thirty thousand, eight hundred nine".