1208673237217 has 2 divisors, whose sum is σ = 1208673237218. Its totient is φ = 1208673237216.

The previous prime is 1208673237193. The next prime is 1208673237263. The reversal of 1208673237217 is 7127323768021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1136439149521 + 72234087696 = 1066039^2 + 268764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1208673237217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1208673237017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604336618608 + 604336618609.

It is an arithmetic number, because the mean of its divisors is an integer number (604336618609).

Almost surely, 2^{1208673237217} is an apocalyptic number.

It is an amenable number.

1208673237217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208673237217 is an equidigital number, since it uses as much as digits as its factorization.

1208673237217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The spelling of 1208673237217 in words is "one trillion, two hundred eight billion, six hundred seventy-three million, two hundred thirty-seven thousand, two hundred seventeen".