89688805292861 has 2 divisors, whose sum is σ = 89688805292862. Its totient is φ = 89688805292860.

The previous prime is 89688805292831. The next prime is 89688805292899. The reversal of 89688805292861 is 16829250888698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70938337800100 + 18750467492761 = 8422490^2 + 4330181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89688805292861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89688805292831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44844402646430 + 44844402646431.

It is an arithmetic number, because the mean of its divisors is an integer number (44844402646431).

Almost surely, 2^{89688805292861} is an apocalyptic number.

It is an amenable number.

89688805292861 is a deficient number, since it is larger than the sum of its proper divisors (1).

89688805292861 is an equidigital number, since it uses as much as digits as its factorization.

89688805292861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1911029760, while the sum is 80.

The spelling of 89688805292861 in words is "eighty-nine trillion, six hundred eighty-eight billion, eight hundred five million, two hundred ninety-two thousand, eight hundred sixty-one".