89876543209 has 2 divisors, whose sum is σ = 89876543210. Its totient is φ = 89876543208.

The previous prime is 89876543173. The next prime is 89876543213. The reversal of 89876543209 is 90234567898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66137437584 + 23739105625 = 257172^2 + 154075^2 .

It is a cyclic number.

It is not a de Polignac number, because 89876543209 - 2⁹ = 89876542697 is a prime.

It is not a weakly prime, because it can be changed into another prime (89876543249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44938271604 + 44938271605.

It is an arithmetic number, because the mean of its divisors is an integer number (44938271605).

Almost surely, 2^89876543209 is an apocalyptic number.

It is an amenable number.

89876543209 is a deficient number, since it is larger than the sum of its proper divisors (1).

89876543209 is an equidigital number, since it uses as much as digits as its factorization.

89876543209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 89876543209 in words is "eighty-nine billion, eight hundred seventy-six million, five hundred forty-three thousand, two hundred nine".