671127257 has 2 divisors, whose sum is σ = 671127258. Its totient is φ = 671127256.

The previous prime is 671127229. The next prime is 671127313. The reversal of 671127257 is 752721176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501580816 + 169546441 = 22396^2 + 13021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671127257 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671127257.

It is not a weakly prime, because it can be changed into another prime (671127217) 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, 335563628 + 335563629.

It is an arithmetic number, because the mean of its divisors is an integer number (335563629).

Almost surely, 2^671127257 is an apocalyptic number.

It is an amenable number.

671127257 is a deficient number, since it is larger than the sum of its proper divisors (1).

671127257 is an equidigital number, since it uses as much as digits as its factorization.

671127257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41160, while the sum is 38.

The square root of 671127257 is about 25906.1239285232. The cubic root of 671127257 is about 875.5244777269.

The spelling of 671127257 in words is "six hundred seventy-one million, one hundred twenty-seven thousand, two hundred fifty-seven".