84506489 has 2 divisors, whose sum is σ = 84506490. Its totient is φ = 84506488.

The previous prime is 84506459. The next prime is 84506503. The reversal of 84506489 is 98460548.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71690089 + 12816400 = 8467^2 + 3580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84506489 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84506459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42253244 + 42253245.

It is an arithmetic number, because the mean of its divisors is an integer number (42253245).

Almost surely, 2^84506489 is an apocalyptic number.

It is an amenable number.

84506489 is a deficient number, since it is larger than the sum of its proper divisors (1).

84506489 is an equidigital number, since it uses as much as digits as its factorization.

84506489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 84506489 is about 9192.7411037187. The cubic root of 84506489 is about 438.8303802105.

The spelling of 84506489 in words is "eighty-four million, five hundred six thousand, four hundred eighty-nine".