605123145217 has 2 divisors, whose sum is σ = 605123145218. Its totient is φ = 605123145216.

The previous prime is 605123145197. The next prime is 605123145247. The reversal of 605123145217 is 712541321506.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 539400644721 + 65722500496 = 734439^2 + 256364^2 .

It is a cyclic number.

It is not a de Polignac number, because 605123145217 - 2¹⁵ = 605123112449 is a prime.

It is not a weakly prime, because it can be changed into another prime (605123145247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302561572608 + 302561572609.

It is an arithmetic number, because the mean of its divisors is an integer number (302561572609).

Almost surely, 2^605123145217 is an apocalyptic number.

It is an amenable number.

605123145217 is a deficient number, since it is larger than the sum of its proper divisors (1).

605123145217 is an equidigital number, since it uses as much as digits as its factorization.

605123145217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 605123145217 in words is "six hundred five billion, one hundred twenty-three million, one hundred forty-five thousand, two hundred seventeen".