12689472031 has 4 divisors (see below), whose sum is σ = 13357339000. Its totient is φ = 12021605064.

The previous prime is 12689472007. The next prime is 12689472041. The reversal of 12689472031 is 13027498621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12689472031 - 2⁵ = 12689471999 is a prime.

It is a super-2 number, since 2×12689472031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689472001) 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, 333933456 + ... + 333933493.

It is an arithmetic number, because the mean of its divisors is an integer number (3339334750).

Almost surely, 2^12689472031 is an apocalyptic number.

12689472031 is a deficient number, since it is larger than the sum of its proper divisors (667866969).

12689472031 is an equidigital number, since it uses as much as digits as its factorization.

12689472031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667866968.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 12689472031 in words is "twelve billion, six hundred eighty-nine million, four hundred seventy-two thousand, thirty-one".