84866489 has 2 divisors, whose sum is σ = 84866490. Its totient is φ = 84866488.

The previous prime is 84866479. The next prime is 84866519. The reversal of 84866489 is 98466848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75986089 + 8880400 = 8717^2 + 2980^2 .

It is a cyclic number.

It is not a de Polignac number, because 84866489 - 2¹⁶ = 84800953 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 84866489.

It is not a weakly prime, because it can be changed into another prime (84866449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42433244 + 42433245.

It is an arithmetic number, because the mean of its divisors is an integer number (42433245).

Almost surely, 2^84866489 is an apocalyptic number.

It is an amenable number.

84866489 is a deficient number, since it is larger than the sum of its proper divisors (1).

84866489 is an equidigital number, since it uses as much as digits as its factorization.

84866489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2654208, while the sum is 53.

The square root of 84866489 is about 9212.3009612148. The cubic root of 84866489 is about 439.4526406491.

The spelling of 84866489 in words is "eighty-four million, eight hundred sixty-six thousand, four hundred eighty-nine".