12972687209 has 8 divisors (see below), whose sum is σ = 13657404480. Its totient is φ = 12288164400.

The previous prime is 12972687197. The next prime is 12972687239. The reversal of 12972687209 is 90278627921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12972687209 - 2⁴ = 12972687193 is a prime.

It is a super-2 number, since 2×12972687209² (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 (12972687239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100004 + ... + 189594.

It is an arithmetic number, because the mean of its divisors is an integer number (1707175560).

Almost surely, 2^12972687209 is an apocalyptic number.

12972687209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12972687209 is a deficient number, since it is larger than the sum of its proper divisors (684717271).

12972687209 is an equidigital number, since it uses as much as digits as its factorization.

12972687209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97231.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 12972687209 in words is "twelve billion, nine hundred seventy-two million, six hundred eighty-seven thousand, two hundred nine".