1208889415117 has 2 divisors, whose sum is σ = 1208889415118. Its totient is φ = 1208889415116.

The previous prime is 1208889415109. The next prime is 1208889415141. The reversal of 1208889415117 is 7115149888021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1208550634281 + 338780836 = 1099341^2 + 18406^2 .

It is a cyclic number.

It is not a de Polignac number, because 1208889415117 - 2³ = 1208889415109 is a prime.

It is a super-2 number, since 2×1208889415117² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1208889410117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604444707558 + 604444707559.

It is an arithmetic number, because the mean of its divisors is an integer number (604444707559).

Almost surely, 2^{1208889415117} is an apocalyptic number.

It is an amenable number.

1208889415117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208889415117 is an equidigital number, since it uses as much as digits as its factorization.

1208889415117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 55.

The spelling of 1208889415117 in words is "one trillion, two hundred eight billion, eight hundred eighty-nine million, four hundred fifteen thousand, one hundred seventeen".