12997952169 has 4 divisors (see below), whose sum is σ = 17330602896. Its totient is φ = 8665301444.

The previous prime is 12997952137. The next prime is 12997952171. The reversal of 12997952169 is 96125979921.

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: 96125979921 = 3 ⋅32041993307.

It is a cyclic number.

It is not a de Polignac number, because 12997952169 - 2⁵ = 12997952137 is a prime.

It is a super-2 number, since 2×12997952169² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12997952129) 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, 2166325359 + ... + 2166325364.

It is an arithmetic number, because the mean of its divisors is an integer number (4332650724).

Almost surely, 2^12997952169 is an apocalyptic number.

It is an amenable number.

12997952169 is a deficient number, since it is larger than the sum of its proper divisors (4332650727).

12997952169 is an equidigital number, since it uses as much as digits as its factorization.

12997952169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332650726.

The product of its digits is 5511240, while the sum is 60.

The spelling of 12997952169 in words is "twelve billion, nine hundred ninety-seven million, nine hundred fifty-two thousand, one hundred sixty-nine".