671831885 has 8 divisors (see below), whose sum is σ = 806556696. Its totient is φ = 537226560.

The previous prime is 671831873. The next prime is 671831899. The reversal of 671831885 is 588138176.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8099716 + 663732169 = 2846^2 + 25763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 671831885 - 2⁶ = 671831821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16994 + ... + 40403.

It is an arithmetic number, because the mean of its divisors is an integer number (100819587).

Almost surely, 2^671831885 is an apocalyptic number.

It is an amenable number.

671831885 is a deficient number, since it is larger than the sum of its proper divisors (134724811).

671831885 is a wasteful number, since it uses less digits than its factorization.

671831885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59743.

The product of its digits is 322560, while the sum is 47.

The square root of 671831885 is about 25919.7200023457. The cubic root of 671831885 is about 875.8307799353.

The spelling of 671831885 in words is "six hundred seventy-one million, eight hundred thirty-one thousand, eight hundred eighty-five".