195665017 has 2 divisors, whose sum is σ = 195665018. Its totient is φ = 195665016.

The previous prime is 195665011. The next prime is 195665027. The reversal of 195665017 is 710566591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194435136 + 1229881 = 13944^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 195665017 - 2³ = 195665009 is a prime.

It is a super-2 number, since 2×195665017² = 76569597755220578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195665011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97832508 + 97832509.

It is an arithmetic number, because the mean of its divisors is an integer number (97832509).

Almost surely, 2^195665017 is an apocalyptic number.

It is an amenable number.

195665017 is a deficient number, since it is larger than the sum of its proper divisors (1).

195665017 is an equidigital number, since it uses as much as digits as its factorization.

195665017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 195665017 is about 13988.0312052840. The cubic root of 195665017 is about 580.5474587185.

The spelling of 195665017 in words is "one hundred ninety-five million, six hundred sixty-five thousand, seventeen".