671680343 has 4 divisors (see below), whose sum is σ = 707031960. Its totient is φ = 636328728.

The previous prime is 671680301. The next prime is 671680369. The reversal of 671680343 is 343086176.

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 671680343 - 2⁶ = 671680279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671680297 and 671680306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671680393) 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, 17675780 + ... + 17675817.

It is an arithmetic number, because the mean of its divisors is an integer number (176757990).

Almost surely, 2^671680343 is an apocalyptic number.

671680343 is a deficient number, since it is larger than the sum of its proper divisors (35351617).

671680343 is a wasteful number, since it uses less digits than its factorization.

671680343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35351616.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 671680343 is about 25916.7965420111. The cubic root of 671680343 is about 875.7649226221.

The spelling of 671680343 in words is "six hundred seventy-one million, six hundred eighty thousand, three hundred forty-three".