12899869 has 2 divisors, whose sum is σ = 12899870. Its totient is φ = 12899868.

The previous prime is 12899857. The next prime is 12899893. The reversal of 12899869 is 96899821.

12899869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 544644 = 3515^2 + 738^2 .

It is an emirp because it is prime and its reverse (96899821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12899869 - 2⁵ = 12899837 is a prime.

It is a super-2 number, since 2×12899869² = 332813240434322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12899899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6449934 + 6449935.

It is an arithmetic number, because the mean of its divisors is an integer number (6449935).

Almost surely, 2^12899869 is an apocalyptic number.

It is an amenable number.

12899869 is a deficient number, since it is larger than the sum of its proper divisors (1).

12899869 is an equidigital number, since it uses as much as digits as its factorization.

12899869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 52.

The square root of 12899869 is about 3591.6387624593. The cubic root of 12899869 is about 234.5282160013.

The spelling of 12899869 in words is "twelve million, eight hundred ninety-nine thousand, eight hundred sixty-nine".