84284909 has 2 divisors, whose sum is σ = 84284910. Its totient is φ = 84284908.

The previous prime is 84284843. The next prime is 84284917. The reversal of 84284909 is 90948248.

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., 82537225 + 1747684 = 9085^2 + 1322^2 .

It is a cyclic number.

It is not a de Polignac number, because 84284909 - 2⁸ = 84284653 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 84284909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84284989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42142454 + 42142455.

It is an arithmetic number, because the mean of its divisors is an integer number (42142455).

Almost surely, 2^84284909 is an apocalyptic number.

It is an amenable number.

84284909 is a deficient number, since it is larger than the sum of its proper divisors (1).

84284909 is an equidigital number, since it uses as much as digits as its factorization.

84284909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 84284909 is about 9180.6812928017. The cubic root of 84284909 is about 438.4464998457.

The spelling of 84284909 in words is "eighty-four million, two hundred eighty-four thousand, nine hundred nine".