671251169 has 2 divisors, whose sum is σ = 671251170. Its totient is φ = 671251168.

The previous prime is 671251123. The next prime is 671251177. The reversal of 671251169 is 961152176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661106944 + 10144225 = 25712^2 + 3185^2 .

It is a cyclic number.

It is not a de Polignac number, because 671251169 - 2²⁰ = 670202593 is a prime.

It is a super-2 number, since 2×671251169² = 901156263767733122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (671551169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335625584 + 335625585.

It is an arithmetic number, because the mean of its divisors is an integer number (335625585).

Almost surely, 2^671251169 is an apocalyptic number.

It is an amenable number.

671251169 is a deficient number, since it is larger than the sum of its proper divisors (1).

671251169 is an equidigital number, since it uses as much as digits as its factorization.

671251169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 38.

The square root of 671251169 is about 25908.5153762233. The cubic root of 671251169 is about 875.5783578774.

The spelling of 671251169 in words is "six hundred seventy-one million, two hundred fifty-one thousand, one hundred sixty-nine".