671835161 has 2 divisors, whose sum is σ = 671835162. Its totient is φ = 671835160.

The previous prime is 671835097. The next prime is 671835169. The reversal of 671835161 is 161538176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 622203136 + 49632025 = 24944^2 + 7045^2 .

It is a cyclic number.

It is not a de Polignac number, because 671835161 - 2⁶ = 671835097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671835169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335917580 + 335917581.

It is an arithmetic number, because the mean of its divisors is an integer number (335917581).

Almost surely, 2^671835161 is an apocalyptic number.

It is an amenable number.

671835161 is a deficient number, since it is larger than the sum of its proper divisors (1).

671835161 is an equidigital number, since it uses as much as digits as its factorization.

671835161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 671835161 is about 25919.7831973958. The cubic root of 671835161 is about 875.8322035142.

The spelling of 671835161 in words is "six hundred seventy-one million, eight hundred thirty-five thousand, one hundred sixty-one".