671774171 has 2 divisors, whose sum is σ = 671774172. Its totient is φ = 671774170.

The previous prime is 671774167. The next prime is 671774197. The reversal of 671774171 is 171477176.

671774171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671774171 - 2² = 671774167 is a prime.

It is a Sophie Germain prime.

It is equal to p_34865645 and since 671774171 and 34865645 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (671774161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335887085 + 335887086.

It is an arithmetic number, because the mean of its divisors is an integer number (335887086).

Almost surely, 2^671774171 is an apocalyptic number.

671774171 is a deficient number, since it is larger than the sum of its proper divisors (1).

671774171 is an equidigital number, since it uses as much as digits as its factorization.

671774171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57624, while the sum is 41.

The square root of 671774171 is about 25918.6066562229. The cubic root of 671774171 is about 875.8056996802.

The spelling of 671774171 in words is "six hundred seventy-one million, seven hundred seventy-four thousand, one hundred seventy-one".