671831887 has 8 divisors (see below), whose sum is σ = 707506560. Its totient is φ = 636188760.

The previous prime is 671831873. The next prime is 671831899. The reversal of 671831887 is 788138176.

671831887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 671831887 - 2¹⁵ = 671799119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671831887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671831827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44988 + ... + 58030.

It is an arithmetic number, because the mean of its divisors is an integer number (88438320).

Almost surely, 2^671831887 is an apocalyptic number.

671831887 is a deficient number, since it is larger than the sum of its proper divisors (35674673).

671831887 is a wasteful number, since it uses less digits than its factorization.

671831887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15773.

The product of its digits is 451584, while the sum is 49.

The square root of 671831887 is about 25919.7200409264. The cubic root of 671831887 is about 875.8307808044.

The spelling of 671831887 in words is "six hundred seventy-one million, eight hundred thirty-one thousand, eight hundred eighty-seven".