84809227 has 2 divisors, whose sum is σ = 84809228. Its totient is φ = 84809226.

The previous prime is 84809171. The next prime is 84809237. The reversal of 84809227 is 72290848.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84809227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84809227.

It is not a weakly prime, because it can be changed into another prime (84809237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42404613 + 42404614.

It is an arithmetic number, because the mean of its divisors is an integer number (42404614).

Almost surely, 2^84809227 is an apocalyptic number.

84809227 is a deficient number, since it is larger than the sum of its proper divisors (1).

84809227 is an equidigital number, since it uses as much as digits as its factorization.

84809227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 84809227 is about 9209.1925270351. The cubic root of 84809227 is about 439.3537810594.

The spelling of 84809227 in words is "eighty-four million, eight hundred nine thousand, two hundred twenty-seven".