89831598817 has 2 divisors, whose sum is σ = 89831598818. Its totient is φ = 89831598816.

The previous prime is 89831598803. The next prime is 89831598827. The reversal of 89831598817 is 71889513898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89717621841 + 113976976 = 299529^2 + 10676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89831598817 is a prime.

It is a super-2 number, since 2×89831598817² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89831598827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44915799408 + 44915799409.

It is an arithmetic number, because the mean of its divisors is an integer number (44915799409).

Almost surely, 2^89831598817 is an apocalyptic number.

It is an amenable number.

89831598817 is a deficient number, since it is larger than the sum of its proper divisors (1).

89831598817 is an equidigital number, since it uses as much as digits as its factorization.

89831598817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34836480, while the sum is 67.

The spelling of 89831598817 in words is "eighty-nine billion, eight hundred thirty-one million, five hundred ninety-eight thousand, eight hundred seventeen".