671591992 has 16 divisors (see below), whose sum is σ = 1267257960. Its totient is φ = 333656544.

The previous prime is 671591989. The next prime is 671592001. The reversal of 671591992 is 299195176.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266098 + ... + 268609.

Almost surely, 2^671591992 is an apocalyptic number.

It is an amenable number.

671591992 is a deficient number, since it is larger than the sum of its proper divisors (595665968).

671591992 is a wasteful number, since it uses less digits than its factorization.

671591992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534870 (or 534866 counting only the distinct ones).

The product of its digits is 306180, while the sum is 49.

The square root of 671591992 is about 25915.0919735972. The cubic root of 671591992 is about 875.7265223620.

The spelling of 671591992 in words is "six hundred seventy-one million, five hundred ninety-one thousand, nine hundred ninety-two".