12989897 has 2 divisors, whose sum is σ = 12989898. Its totient is φ = 12989896.

The previous prime is 12989881. The next prime is 12989927. The reversal of 12989897 is 79898921.

12989897 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., 12187081 + 802816 = 3491^2 + 896^2 .

It is a cyclic number.

It is not a de Polignac number, because 12989897 - 2⁴ = 12989881 is a prime.

It is not a weakly prime, because it can be changed into another prime (12989807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6494948 + 6494949.

It is an arithmetic number, because the mean of its divisors is an integer number (6494949).

Almost surely, 2^12989897 is an apocalyptic number.

It is an amenable number.

12989897 is a deficient number, since it is larger than the sum of its proper divisors (1).

12989897 is an equidigital number, since it uses as much as digits as its factorization.

12989897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 53.

The square root of 12989897 is about 3604.1499691328. The cubic root of 12989897 is about 235.0725413595.

The spelling of 12989897 in words is "twelve million, nine hundred eighty-nine thousand, eight hundred ninety-seven".