12988681 has 2 divisors, whose sum is σ = 12988682. Its totient is φ = 12988680.

The previous prime is 12988643. The next prime is 12988691. The reversal of 12988681 is 18688921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7513081 + 5475600 = 2741^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 12988681 - 2¹³ = 12980489 is a prime.

It is a super-2 number, since 2×12988681² = 337411668239522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12988601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6494340 + 6494341.

It is an arithmetic number, because the mean of its divisors is an integer number (6494341).

Almost surely, 2^12988681 is an apocalyptic number.

It is an amenable number.

12988681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12988681 is an equidigital number, since it uses as much as digits as its factorization.

12988681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 43.

The square root of 12988681 is about 3603.9812707615. The cubic root of 12988681 is about 235.0652059888.

The spelling of 12988681 in words is "twelve million, nine hundred eighty-eight thousand, six hundred eighty-one".