12439238897 has 8 divisors (see below), whose sum is σ = 12538856616. Its totient is φ = 12339879552.

The previous prime is 12439238893. The next prime is 12439238941. The reversal of 12439238897 is 79883293421.

It can be written as a sum of positive squares in 4 ways, for example, as 58003456 + 12381235441 = 7616^2 + 111271^2 .

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 12439238897 - 2² = 12439238893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12439238891) 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, 32663 + ... + 161075.

It is an arithmetic number, because the mean of its divisors is an integer number (1567357077).

Almost surely, 2^12439238897 is an apocalyptic number.

It is an amenable number.

12439238897 is a deficient number, since it is larger than the sum of its proper divisors (99617719).

12439238897 is a wasteful number, since it uses less digits than its factorization.

12439238897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129187.

The product of its digits is 5225472, while the sum is 56.

The spelling of 12439238897 in words is "twelve billion, four hundred thirty-nine million, two hundred thirty-eight thousand, eight hundred ninety-seven".