395854387217 has 2 divisors, whose sum is σ = 395854387218. Its totient is φ = 395854387216.

The previous prime is 395854387139. The next prime is 395854387219. The reversal of 395854387217 is 712783458593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338253907216 + 57600480001 = 581596^2 + 240001^2 .

It is a cyclic number.

It is not a de Polignac number, because 395854387217 - 2²⁴ = 395837610001 is a prime.

Together with 395854387219, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 395854387217.

It is not a weakly prime, because it can be changed into another prime (395854387219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197927193608 + 197927193609.

It is an arithmetic number, because the mean of its divisors is an integer number (197927193609).

Almost surely, 2^395854387217 is an apocalyptic number.

It is an amenable number.

395854387217 is a deficient number, since it is larger than the sum of its proper divisors (1).

395854387217 is an equidigital number, since it uses as much as digits as its factorization.

395854387217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50803200, while the sum is 62.

The spelling of 395854387217 in words is "three hundred ninety-five billion, eight hundred fifty-four million, three hundred eighty-seven thousand, two hundred seventeen".