671000881 has 2 divisors, whose sum is σ = 671000882. Its totient is φ = 671000880.

The previous prime is 671000879. The next prime is 671000899. The reversal of 671000881 is 188000176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609299856 + 61701025 = 24684^2 + 7855^2 .

It is a cyclic number.

It is not a de Polignac number, because 671000881 - 2¹ = 671000879 is a prime.

It is a super-2 number, since 2×671000881² = 900484364605552322, which contains 22 as substring.

Together with 671000879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (671000821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335500440 + 335500441.

It is an arithmetic number, because the mean of its divisors is an integer number (335500441).

Almost surely, 2^671000881 is an apocalyptic number.

It is an amenable number.

671000881 is a deficient number, since it is larger than the sum of its proper divisors (1).

671000881 is an equidigital number, since it uses as much as digits as its factorization.

671000881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 671000881 is about 25903.6846992855. The cubic root of 671000881 is about 875.4695193336.

The spelling of 671000881 in words is "six hundred seventy-one million, eight hundred eighty-one", and thus it is an aban number.