82400089 has 2 divisors, whose sum is σ = 82400090. Its totient is φ = 82400088.

The previous prime is 82400063. The next prime is 82400141. The reversal of 82400089 is 98000428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78854400 + 3545689 = 8880^2 + 1883^2 .

It is a cyclic number.

It is not a de Polignac number, because 82400089 - 2⁵ = 82400057 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82400089.

It is not a weakly prime, because it can be changed into another prime (82400009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41200044 + 41200045.

It is an arithmetic number, because the mean of its divisors is an integer number (41200045).

Almost surely, 2^82400089 is an apocalyptic number.

It is an amenable number.

82400089 is a deficient number, since it is larger than the sum of its proper divisors (1).

82400089 is an equidigital number, since it uses as much as digits as its factorization.

82400089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 82400089 is about 9077.4494765876. The cubic root of 82400089 is about 435.1535794527.

The spelling of 82400089 in words is "eighty-two million, four hundred thousand, eighty-nine".