84434827 has 2 divisors, whose sum is σ = 84434828. Its totient is φ = 84434826.

The previous prime is 84434789. The next prime is 84434839. The reversal of 84434827 is 72843448.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84434827 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 84434827.

It is not a weakly prime, because it can be changed into another prime (84434887) 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, 42217413 + 42217414.

It is an arithmetic number, because the mean of its divisors is an integer number (42217414).

Almost surely, 2^84434827 is an apocalyptic number.

84434827 is a deficient number, since it is larger than the sum of its proper divisors (1).

84434827 is an equidigital number, since it uses as much as digits as its factorization.

84434827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 40.

The square root of 84434827 is about 9188.8425277616. The cubic root of 84434827 is about 438.7063015491.

The spelling of 84434827 in words is "eighty-four million, four hundred thirty-four thousand, eight hundred twenty-seven".