671036891 has 8 divisors (see below), whose sum is σ = 800242944. Its totient is φ = 550166760.

The previous prime is 671036879. The next prime is 671036917. The reversal of 671036891 is 198630176.

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 671036891 - 2¹⁰ = 671035867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671038891) 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, 2083805 + ... + 2084126.

It is an arithmetic number, because the mean of its divisors is an integer number (100030368).

Almost surely, 2^671036891 is an apocalyptic number.

671036891 is a deficient number, since it is larger than the sum of its proper divisors (129206053).

671036891 is a wasteful number, since it uses less digits than its factorization.

671036891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167961.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 671036891 is about 25904.3797648197. The cubic root of 671036891 is about 875.4851800649.

The spelling of 671036891 in words is "six hundred seventy-one million, thirty-six thousand, eight hundred ninety-one".