12909897 has 48 divisors (see below), whose sum is σ = 25054848. Its totient is φ = 6186240.

The previous prime is 12909893. The next prime is 12909907. The reversal of 12909897 is 79890921.

It is not a de Polignac number, because 12909897 - 2² = 12909893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12909893) 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 in 47 ways as a sum of consecutive naturals, for example, 8293 + ... + 9725.

It is an arithmetic number, because the mean of its divisors is an integer number (521976).

Almost surely, 2^12909897 is an apocalyptic number.

It is an amenable number.

12909897 is a deficient number, since it is larger than the sum of its proper divisors (12144951).

12909897 is a wasteful number, since it uses less digits than its factorization.

12909897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 12909897 is about 3593.0345113845. The cubic root of 12909897 is about 234.5889721684.

It can be divided in two parts, 12 and 909897, that added together give a palindrome (909909).

The spelling of 12909897 in words is "twelve million, nine hundred nine thousand, eight hundred ninety-seven".