12887869 has 2 divisors, whose sum is σ = 12887870. Its totient is φ = 12887868.

The previous prime is 12887863. The next prime is 12887873. The reversal of 12887869 is 96878821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11471769 + 1416100 = 3387^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 12887869 - 2¹⁷ = 12756797 is a prime.

It is a super-2 number, since 2×12887869² = 332194334722322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12887863) 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, 6443934 + 6443935.

It is an arithmetic number, because the mean of its divisors is an integer number (6443935).

Almost surely, 2^12887869 is an apocalyptic number.

It is an amenable number.

12887869 is a deficient number, since it is larger than the sum of its proper divisors (1).

12887869 is an equidigital number, since it uses as much as digits as its factorization.

12887869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 49.

The square root of 12887869 is about 3589.9678271539. The cubic root of 12887869 is about 234.4554707738.

The spelling of 12887869 in words is "twelve million, eight hundred eighty-seven thousand, eight hundred sixty-nine".