671881323 has 4 divisors (see below), whose sum is σ = 895841768. Its totient is φ = 447920880.

The previous prime is 671881319. The next prime is 671881349. The reversal of 671881323 is 323188176.

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

It is not a de Polignac number, because 671881323 - 2² = 671881319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671883323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111980218 + ... + 111980223.

It is an arithmetic number, because the mean of its divisors is an integer number (223960442).

Almost surely, 2^671881323 is an apocalyptic number.

671881323 is a deficient number, since it is larger than the sum of its proper divisors (223960445).

671881323 is a wasteful number, since it uses less digits than its factorization.

671881323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223960444.

The product of its digits is 48384, while the sum is 39.

The square root of 671881323 is about 25920.6736602273. The cubic root of 671881323 is about 875.8522626212.

The spelling of 671881323 in words is "six hundred seventy-one million, eight hundred eighty-one thousand, three hundred twenty-three".