12889163869 has 2 divisors, whose sum is σ = 12889163870. Its totient is φ = 12889163868.

The previous prime is 12889163789. The next prime is 12889163879. The reversal of 12889163869 is 96836198821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8637471844 + 4251692025 = 92938^2 + 65205^2 .

It is an emirp because it is prime and its reverse (96836198821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12889163869 is a prime.

It is a super-2 number, since 2×12889163869² (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 (12889163879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444581934 + 6444581935.

It is an arithmetic number, because the mean of its divisors is an integer number (6444581935).

Almost surely, 2^12889163869 is an apocalyptic number.

It is an amenable number.

12889163869 is a deficient number, since it is larger than the sum of its proper divisors (1).

12889163869 is an equidigital number, since it uses as much as digits as its factorization.

12889163869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8957952, while the sum is 61.

The spelling of 12889163869 in words is "twelve billion, eight hundred eighty-nine million, one hundred sixty-three thousand, eight hundred sixty-nine".