12989865697 has 4 divisors (see below), whose sum is σ = 12995969220. Its totient is φ = 12983762176.

The previous prime is 12989865673. The next prime is 12989865701. The reversal of 12989865697 is 79656898921.

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 5818485841 + 7171379856 = 76279^2 + 84684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12989865697 is a prime.

It is a super-2 number, since 2×12989865697² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12989865607) 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, 3048568 + ... + 3052825.

It is an arithmetic number, because the mean of its divisors is an integer number (3248992305).

Almost surely, 2^12989865697 is an apocalyptic number.

It is an amenable number.

12989865697 is a deficient number, since it is larger than the sum of its proper divisors (6103523).

12989865697 is an equidigital number, since it uses as much as digits as its factorization.

12989865697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103522.

The product of its digits is 117573120, while the sum is 70.

The spelling of 12989865697 in words is "twelve billion, nine hundred eighty-nine million, eight hundred sixty-five thousand, six hundred ninety-seven".