11938071169 has 2 divisors, whose sum is σ = 11938071170. Its totient is φ = 11938071168.

The previous prime is 11938071161. The next prime is 11938071193. The reversal of 11938071169 is 96117083911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6742544769 + 5195526400 = 82113^2 + 72080^2 .

It is an emirp because it is prime and its reverse (96117083911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11938071169 - 2³ = 11938071161 is a prime.

It is a super-2 number, since 2×11938071169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11938071161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5969035584 + 5969035585.

It is an arithmetic number, because the mean of its divisors is an integer number (5969035585).

Almost surely, 2^11938071169 is an apocalyptic number.

It is an amenable number.

11938071169 is a deficient number, since it is larger than the sum of its proper divisors (1).

11938071169 is an equidigital number, since it uses as much as digits as its factorization.

11938071169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 46.

The spelling of 11938071169 in words is "eleven billion, nine hundred thirty-eight million, seventy-one thousand, one hundred sixty-nine".