89128663697 has 2 divisors, whose sum is σ = 89128663698. Its totient is φ = 89128663696.

The previous prime is 89128663669. The next prime is 89128663747. The reversal of 89128663697 is 79636682198.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78577059856 + 10551603841 = 280316^2 + 102721^2 .

It is a cyclic number.

It is not a de Polignac number, because 89128663697 - 2²⁸ = 88860228241 is a prime.

It is not a weakly prime, because it can be changed into another prime (89128663607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44564331848 + 44564331849.

It is an arithmetic number, because the mean of its divisors is an integer number (44564331849).

Almost surely, 2^89128663697 is an apocalyptic number.

It is an amenable number.

89128663697 is a deficient number, since it is larger than the sum of its proper divisors (1).

89128663697 is an equidigital number, since it uses as much as digits as its factorization.

89128663697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 65.

The spelling of 89128663697 in words is "eighty-nine billion, one hundred twenty-eight million, six hundred sixty-three thousand, six hundred ninety-seven".