11838840869 has 2 divisors, whose sum is σ = 11838840870. Its totient is φ = 11838840868.

The previous prime is 11838840847. The next prime is 11838840907. The reversal of 11838840869 is 96804883811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9281010244 + 2557830625 = 96338^2 + 50575^2 .

It is an emirp because it is prime and its reverse (96804883811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11838840869 - 2¹² = 11838836773 is a prime.

It is a super-2 number, since 2×11838840869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11838840809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5919420434 + 5919420435.

It is an arithmetic number, because the mean of its divisors is an integer number (5919420435).

Almost surely, 2^11838840869 is an apocalyptic number.

It is an amenable number.

11838840869 is a deficient number, since it is larger than the sum of its proper divisors (1).

11838840869 is an equidigital number, since it uses as much as digits as its factorization.

11838840869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2654208, while the sum is 56.

The spelling of 11838840869 in words is "eleven billion, eight hundred thirty-eight million, eight hundred forty thousand, eight hundred sixty-nine".