12872724437 has 2 divisors, whose sum is σ = 12872724438. Its totient is φ = 12872724436.

The previous prime is 12872724419. The next prime is 12872724439. The reversal of 12872724437 is 73442727821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10918996036 + 1953728401 = 104494^2 + 44201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12872724437 is a prime.

Together with 12872724439, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12872724391 and 12872724400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12872724439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436362218 + 6436362219.

It is an arithmetic number, because the mean of its divisors is an integer number (6436362219).

Almost surely, 2^12872724437 is an apocalyptic number.

It is an amenable number.

12872724437 is a deficient number, since it is larger than the sum of its proper divisors (1).

12872724437 is an equidigital number, since it uses as much as digits as its factorization.

12872724437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1053696, while the sum is 47.

The spelling of 12872724437 in words is "twelve billion, eight hundred seventy-two million, seven hundred twenty-four thousand, four hundred thirty-seven".