671117512349 has 2 divisors, whose sum is σ = 671117512350. Its totient is φ = 671117512348.

The previous prime is 671117512321. The next prime is 671117512451. The reversal of 671117512349 is 943215711176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605350909849 + 65766602500 = 778043^2 + 256450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671117512349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671117592349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335558756174 + 335558756175.

It is an arithmetic number, because the mean of its divisors is an integer number (335558756175).

Almost surely, 2^671117512349 is an apocalyptic number.

It is an amenable number.

671117512349 is a deficient number, since it is larger than the sum of its proper divisors (1).

671117512349 is an equidigital number, since it uses as much as digits as its factorization.

671117512349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 47.

The spelling of 671117512349 in words is "six hundred seventy-one billion, one hundred seventeen million, five hundred twelve thousand, three hundred forty-nine".