673946809 has 8 divisors (see below), whose sum is σ = 681158912. Its totient is φ = 666772560.

The previous prime is 673946753. The next prime is 673946813. The reversal of 673946809 is 908649376.

673946809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 673946809 - 2⁷ = 673946681 is a prime.

It is a super-2 number, since 2×673946809² = 908408602722564962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673946879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27079 + ... + 45619.

It is an arithmetic number, because the mean of its divisors is an integer number (85144864).

Almost surely, 2^673946809 is an apocalyptic number.

It is an amenable number.

673946809 is a deficient number, since it is larger than the sum of its proper divisors (7212103).

673946809 is a wasteful number, since it uses less digits than its factorization.

673946809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18927.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 673946809 is about 25960.4855308987. The cubic root of 673946809 is about 876.7488544696.

The spelling of 673946809 in words is "six hundred seventy-three million, nine hundred forty-six thousand, eight hundred nine".