89345717081 has 2 divisors, whose sum is σ = 89345717082. Its totient is φ = 89345717080.

The previous prime is 89345717023. The next prime is 89345717093. The reversal of 89345717081 is 18071754398.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83699697481 + 5646019600 = 289309^2 + 75140^2 .

It is a cyclic number.

It is not a de Polignac number, because 89345717081 - 2⁶ = 89345717017 is a prime.

It is a super-2 number, since 2×89345717081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89345717281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44672858540 + 44672858541.

It is an arithmetic number, because the mean of its divisors is an integer number (44672858541).

Almost surely, 2^89345717081 is an apocalyptic number.

It is an amenable number.

89345717081 is a deficient number, since it is larger than the sum of its proper divisors (1).

89345717081 is an equidigital number, since it uses as much as digits as its factorization.

89345717081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 89345717081 in words is "eighty-nine billion, three hundred forty-five million, seven hundred seventeen thousand, eighty-one".