89698775681 has 2 divisors, whose sum is σ = 89698775682. Its totient is φ = 89698775680.

The previous prime is 89698775669. The next prime is 89698775717. The reversal of 89698775681 is 18657789698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89305943281 + 392832400 = 298841^2 + 19820^2 .

It is a cyclic number.

It is not a de Polignac number, because 89698775681 - 2¹⁰ = 89698774657 is a prime.

It is a super-2 number, since 2×89698775681² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 89698775599 and 89698775608.

It is not a weakly prime, because it can be changed into another prime (89698775651) 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, 44849387840 + 44849387841.

It is an arithmetic number, because the mean of its divisors is an integer number (44849387841).

Almost surely, 2^89698775681 is an apocalyptic number.

It is an amenable number.

89698775681 is a deficient number, since it is larger than the sum of its proper divisors (1).

89698775681 is an equidigital number, since it uses as much as digits as its factorization.

89698775681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 365783040, while the sum is 74.

The spelling of 89698775681 in words is "eighty-nine billion, six hundred ninety-eight million, seven hundred seventy-five thousand, six hundred eighty-one".