8987881729 has 2 divisors, whose sum is σ = 8987881730. Its totient is φ = 8987881728.

The previous prime is 8987881711. The next prime is 8987881757. The reversal of 8987881729 is 9271887898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8102700225 + 885181504 = 90015^2 + 29752^2 .

It is a cyclic number.

It is not a de Polignac number, because 8987881729 - 2⁵ = 8987881697 is a prime.

It is not a weakly prime, because it can be changed into another prime (8987881129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4493940864 + 4493940865.

It is an arithmetic number, because the mean of its divisors is an integer number (4493940865).

Almost surely, 2^8987881729 is an apocalyptic number.

It is an amenable number.

8987881729 is a deficient number, since it is larger than the sum of its proper divisors (1).

8987881729 is an equidigital number, since it uses as much as digits as its factorization.

8987881729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32514048, while the sum is 67.

The square root of 8987881729 is about 94804.4393949988. The cubic root of 8987881729 is about 2079.1498104046.

The spelling of 8987881729 in words is "eight billion, nine hundred eighty-seven million, eight hundred eighty-one thousand, seven hundred twenty-nine".