673505689 has 4 divisors (see below), whose sum is σ = 689168656. Its totient is φ = 657842724.

The previous prime is 673505683. The next prime is 673505699. The reversal of 673505689 is 986505376.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 673505689 - 2⁹ = 673505177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673505683) 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, 7831419 + ... + 7831504.

It is an arithmetic number, because the mean of its divisors is an integer number (172292164).

Almost surely, 2^673505689 is an apocalyptic number.

It is an amenable number.

673505689 is a deficient number, since it is larger than the sum of its proper divisors (15662967).

673505689 is a wasteful number, since it uses less digits than its factorization.

673505689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15662966.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The square root of 673505689 is about 25951.9881511995. The cubic root of 673505689 is about 876.5575258856.

The spelling of 673505689 in words is "six hundred seventy-three million, five hundred five thousand, six hundred eighty-nine".