12991298697 has 192 divisors, whose sum is σ = 23933871360. Its totient is φ = 6893144064.

The previous prime is 12991298653. The next prime is 12991298737. The reversal of 12991298697 is 79689219921.

12991298697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12991298697 - 2²⁶ = 12924189833 is a prime.

Its product of digits (8817984) is a multiple of the sum of its prime divisors (252).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12991298297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 79701138 + ... + 79701300.

It is an arithmetic number, because the mean of its divisors is an integer number (124655580).

Almost surely, 2^12991298697 is an apocalyptic number.

12991298697 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12991298697 is a deficient number, since it is larger than the sum of its proper divisors (10942572663).

12991298697 is a wasteful number, since it uses less digits than its factorization.

12991298697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 252 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The spelling of 12991298697 in words is "twelve billion, nine hundred ninety-one million, two hundred ninety-eight thousand, six hundred ninety-seven".