671159717 has 2 divisors, whose sum is σ = 671159718. Its totient is φ = 671159716.

The previous prime is 671159689. The next prime is 671159809. The reversal of 671159717 is 717951176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 553849156 + 117310561 = 23534^2 + 10831^2 .

It is a cyclic number.

It is not a de Polignac number, because 671159717 - 2¹⁶ = 671094181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671159017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335579858 + 335579859.

It is an arithmetic number, because the mean of its divisors is an integer number (335579859).

Almost surely, 2^671159717 is an apocalyptic number.

It is an amenable number.

671159717 is a deficient number, since it is larger than the sum of its proper divisors (1).

671159717 is an equidigital number, since it uses as much as digits as its factorization.

671159717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92610, while the sum is 44.

The square root of 671159717 is about 25906.7504137435. The cubic root of 671159717 is about 875.5385928176.

The spelling of 671159717 in words is "six hundred seventy-one million, one hundred fifty-nine thousand, seven hundred seventeen".