89408889617 has 2 divisors, whose sum is σ = 89408889618. Its totient is φ = 89408889616.

The previous prime is 89408889547. The next prime is 89408889623. The reversal of 89408889617 is 71698880498.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66600641041 + 22808248576 = 258071^2 + 151024^2 .

It is a cyclic number.

It is not a de Polignac number, because 89408889617 - 2¹⁰ = 89408888593 is a prime.

It is not a weakly prime, because it can be changed into another prime (89408889677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44704444808 + 44704444809.

It is an arithmetic number, because the mean of its divisors is an integer number (44704444809).

Almost surely, 2^89408889617 is an apocalyptic number.

It is an amenable number.

89408889617 is a deficient number, since it is larger than the sum of its proper divisors (1).

89408889617 is an equidigital number, since it uses as much as digits as its factorization.

89408889617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55738368, while the sum is 68.

The spelling of 89408889617 in words is "eighty-nine billion, four hundred eight million, eight hundred eighty-nine thousand, six hundred seventeen".