12289897 has 4 divisors (see below), whose sum is σ = 12313156. Its totient is φ = 12266640.

The previous prime is 12289891. The next prime is 12289909. The reversal of 12289897 is 79898221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4511376 + 7778521 = 2124^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 12289897 - 2¹⁵ = 12257129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12289891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10818 + ... + 11899.

It is an arithmetic number, because the mean of its divisors is an integer number (3078289).

Almost surely, 2^12289897 is an apocalyptic number.

It is an amenable number.

12289897 is a deficient number, since it is larger than the sum of its proper divisors (23259).

12289897 is an equidigital number, since it uses as much as digits as its factorization.

12289897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23258.

The product of its digits is 145152, while the sum is 46.

The square root of 12289897 is about 3505.6949382398. The cubic root of 12289897 is about 230.7718054100.

The spelling of 12289897 in words is "twelve million, two hundred eighty-nine thousand, eight hundred ninety-seven".