12873823681 has 2 divisors, whose sum is σ = 12873823682. Its totient is φ = 12873823680.

The previous prime is 12873823667. The next prime is 12873823691. The reversal of 12873823681 is 18632837821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7498001281 + 5375822400 = 86591^2 + 73320^2 .

It is a cyclic number.

It is not a de Polignac number, because 12873823681 - 2⁹ = 12873823169 is a prime.

It is a super-2 number, since 2×12873823681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12873823601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436911840 + 6436911841.

It is an arithmetic number, because the mean of its divisors is an integer number (6436911841).

Almost surely, 2^12873823681 is an apocalyptic number.

It is an amenable number.

12873823681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12873823681 is an equidigital number, since it uses as much as digits as its factorization.

12873823681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 49.

The spelling of 12873823681 in words is "twelve billion, eight hundred seventy-three million, eight hundred twenty-three thousand, six hundred eighty-one".