673881609 has 8 divisors (see below), whose sum is σ = 904021792. Its totient is φ = 446497920.

The previous prime is 673881599. The next prime is 673881641. The reversal of 673881609 is 906188376.

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

It is not a de Polignac number, because 673881609 - 2⁹ = 673881097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673881809) 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, 688552 + ... + 689529.

It is an arithmetic number, because the mean of its divisors is an integer number (113002724).

Almost surely, 2^673881609 is an apocalyptic number.

It is an amenable number.

673881609 is a deficient number, since it is larger than the sum of its proper divisors (230140183).

673881609 is a wasteful number, since it uses less digits than its factorization.

673881609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378247.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 673881609 is about 25959.2297458919. The cubic root of 673881609 is about 876.7205802952.

The spelling of 673881609 in words is "six hundred seventy-three million, eight hundred eighty-one thousand, six hundred nine".