971870717 has 2 divisors, whose sum is σ = 971870718. Its totient is φ = 971870716.

The previous prime is 971870687. The next prime is 971870723. The reversal of 971870717 is 717078179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 971818276 + 52441 = 31174^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 971870717 - 2¹⁴ = 971854333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971870737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485935358 + 485935359.

It is an arithmetic number, because the mean of its divisors is an integer number (485935359).

Almost surely, 2^971870717 is an apocalyptic number.

It is an amenable number.

971870717 is a deficient number, since it is larger than the sum of its proper divisors (1).

971870717 is an equidigital number, since it uses as much as digits as its factorization.

971870717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172872, while the sum is 47.

The square root of 971870717 is about 31174.8410902125. The cubic root of 971870717 is about 990.5342547108.

The spelling of 971870717 in words is "nine hundred seventy-one million, eight hundred seventy thousand, seven hundred seventeen".