12868428169 has 2 divisors, whose sum is σ = 12868428170. Its totient is φ = 12868428168.

The previous prime is 12868428127. The next prime is 12868428173. The reversal of 12868428169 is 96182486821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6721868169 + 6146560000 = 81987^2 + 78400^2 .

It is an emirp because it is prime and its reverse (96182486821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12868428169 - 2¹¹ = 12868426121 is a prime.

It is a super-2 number, since 2×12868428169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12868428119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6434214084 + 6434214085.

It is an arithmetic number, because the mean of its divisors is an integer number (6434214085).

Almost surely, 2^12868428169 is an apocalyptic number.

It is an amenable number.

12868428169 is a deficient number, since it is larger than the sum of its proper divisors (1).

12868428169 is an equidigital number, since it uses as much as digits as its factorization.

12868428169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2654208, while the sum is 55.

The spelling of 12868428169 in words is "twelve billion, eight hundred sixty-eight million, four hundred twenty-eight thousand, one hundred sixty-nine".