673717823 has 4 divisors (see below), whose sum is σ = 695450688. Its totient is φ = 651984960.

The previous prime is 673717819. The next prime is 673717853. The reversal of 673717823 is 328717376.

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

It is a cyclic number.

It is not a de Polignac number, because 673717823 - 2² = 673717819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673717853) 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, 10866386 + ... + 10866447.

It is an arithmetic number, because the mean of its divisors is an integer number (173862672).

Almost surely, 2^673717823 is an apocalyptic number.

673717823 is a deficient number, since it is larger than the sum of its proper divisors (21732865).

673717823 is a wasteful number, since it uses less digits than its factorization.

673717823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21732864.

The product of its digits is 296352, while the sum is 44.

The square root of 673717823 is about 25956.0748766064. The cubic root of 673717823 is about 876.6495459621.

The spelling of 673717823 in words is "six hundred seventy-three million, seven hundred seventeen thousand, eight hundred twenty-three".