671092891 has 16 divisors (see below), whose sum is σ = 772761600. Its totient is φ = 570892608.

The previous prime is 671092883. The next prime is 671092949. The reversal of 671092891 is 198290176.

It is a cyclic number.

It is not a de Polignac number, because 671092891 - 2³ = 671092883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671092291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780820 + ... + 781678.

It is an arithmetic number, because the mean of its divisors is an integer number (48297600).

Almost surely, 2^671092891 is an apocalyptic number.

671092891 is a deficient number, since it is larger than the sum of its proper divisors (101668709).

671092891 is a wasteful number, since it uses less digits than its factorization.

671092891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 671092891 is about 25905.4606405677. The cubic root of 671092891 is about 875.5095333243.

The spelling of 671092891 in words is "six hundred seventy-one million, ninety-two thousand, eight hundred ninety-one".