671185873 has 2 divisors, whose sum is σ = 671185874. Its totient is φ = 671185872.

The previous prime is 671185843. The next prime is 671185901. The reversal of 671185873 is 378581176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 637916049 + 33269824 = 25257^2 + 5768^2 .

It is a cyclic number.

It is not a de Polignac number, because 671185873 - 2⁵ = 671185841 is a prime.

It is a super-2 number, since 2×671185873² = 900980952229544258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (671185843) by changing a digit.

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 as a sum of consecutive naturals, namely, 335592936 + 335592937.

It is an arithmetic number, because the mean of its divisors is an integer number (335592937).

Almost surely, 2^671185873 is an apocalyptic number.

It is an amenable number.

671185873 is a deficient number, since it is larger than the sum of its proper divisors (1).

671185873 is an equidigital number, since it uses as much as digits as its factorization.

671185873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 46.

The square root of 671185873 is about 25907.2552193396. The cubic root of 671185873 is about 875.5499663101.

The spelling of 671185873 in words is "six hundred seventy-one million, one hundred eighty-five thousand, eight hundred seventy-three".