12997948913 has 4 divisors (see below), whose sum is σ = 13181018688. Its totient is φ = 12814879140.

The previous prime is 12997948903. The next prime is 12997948933. The reversal of 12997948913 is 31984979921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31984979921 = 173 ⋅184884277.

It is a cyclic number.

It is not a de Polignac number, because 12997948913 - 2⁴ = 12997948897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12997948903) 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, 91534781 + ... + 91534922.

It is an arithmetic number, because the mean of its divisors is an integer number (3295254672).

Almost surely, 2^12997948913 is an apocalyptic number.

It is an amenable number.

12997948913 is a deficient number, since it is larger than the sum of its proper divisors (183069775).

12997948913 is an equidigital number, since it uses as much as digits as its factorization.

12997948913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183069774.

The product of its digits is 8817984, while the sum is 62.

The spelling of 12997948913 in words is "twelve billion, nine hundred ninety-seven million, nine hundred forty-eight thousand, nine hundred thirteen".