671682371 has 4 divisors (see below), whose sum is σ = 673455000. Its totient is φ = 669909744.

The previous prime is 671682293. The next prime is 671682379. The reversal of 671682371 is 173286176.

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 671682371 - 2¹⁰ = 671681347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671682379) 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, 885746 + ... + 886503.

It is an arithmetic number, because the mean of its divisors is an integer number (168363750).

Almost surely, 2^671682371 is an apocalyptic number.

671682371 is a deficient number, since it is larger than the sum of its proper divisors (1772629).

671682371 is a wasteful number, since it uses less digits than its factorization.

671682371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772628.

The product of its digits is 84672, while the sum is 41.

The square root of 671682371 is about 25916.8356671875. The cubic root of 671682371 is about 875.7658040183.

The spelling of 671682371 in words is "six hundred seventy-one million, six hundred eighty-two thousand, three hundred seventy-one".