865197017 has 2 divisors, whose sum is σ = 865197018. Its totient is φ = 865197016.

The previous prime is 865197001. The next prime is 865197041. The reversal of 865197017 is 710791568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 865006921 + 190096 = 29411^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 865197017 - 2⁴ = 865197001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (865197077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432598508 + 432598509.

It is an arithmetic number, because the mean of its divisors is an integer number (432598509).

Almost surely, 2^865197017 is an apocalyptic number.

It is an amenable number.

865197017 is a deficient number, since it is larger than the sum of its proper divisors (1).

865197017 is an equidigital number, since it uses as much as digits as its factorization.

865197017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 44.

The square root of 865197017 is about 29414.2315384917. The cubic root of 865197017 is about 952.8802768312.

The spelling of 865197017 in words is "eight hundred sixty-five million, one hundred ninety-seven thousand, seventeen".