12872231657 has 2 divisors, whose sum is σ = 12872231658. Its totient is φ = 12872231656.

The previous prime is 12872231623. The next prime is 12872231677. The reversal of 12872231657 is 75613227821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7529206441 + 5343025216 = 86771^2 + 73096^2 .

It is an emirp because it is prime and its reverse (75613227821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12872231657 is a prime.

It is not a weakly prime, because it can be changed into another prime (12872231677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436115828 + 6436115829.

It is an arithmetic number, because the mean of its divisors is an integer number (6436115829).

Almost surely, 2^12872231657 is an apocalyptic number.

It is an amenable number.

12872231657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12872231657 is an equidigital number, since it uses as much as digits as its factorization.

12872231657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 44.

The spelling of 12872231657 in words is "twelve billion, eight hundred seventy-two million, two hundred thirty-one thousand, six hundred fifty-seven".