12972996609 has 4 divisors (see below), whose sum is σ = 17297328816. Its totient is φ = 8648664404.

The previous prime is 12972996593. The next prime is 12972996649. The reversal of 12972996609 is 90669927921.

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.

It is a cyclic number.

It is not a de Polignac number, because 12972996609 - 2⁴ = 12972996593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12972996649) 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, 2162166099 + ... + 2162166104.

It is an arithmetic number, because the mean of its divisors is an integer number (4324332204).

Almost surely, 2^12972996609 is an apocalyptic number.

It is an amenable number.

12972996609 is a deficient number, since it is larger than the sum of its proper divisors (4324332207).

12972996609 is an equidigital number, since it uses as much as digits as its factorization.

12972996609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4324332206.

The product of its (nonzero) digits is 6613488, while the sum is 60.

The spelling of 12972996609 in words is "twelve billion, nine hundred seventy-two million, nine hundred ninety-six thousand, six hundred nine".