84144847 has 2 divisors, whose sum is σ = 84144848. Its totient is φ = 84144846.

The previous prime is 84144821. The next prime is 84144877. The reversal of 84144847 is 74844148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84144847 - 2¹⁵ = 84112079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84144877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42072423 + 42072424.

It is an arithmetic number, because the mean of its divisors is an integer number (42072424).

Almost surely, 2^84144847 is an apocalyptic number.

84144847 is a deficient number, since it is larger than the sum of its proper divisors (1).

84144847 is an equidigital number, since it uses as much as digits as its factorization.

84144847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114688, while the sum is 40.

The square root of 84144847 is about 9173.0500380190. The cubic root of 84144847 is about 438.2034996769.

The spelling of 84144847 in words is "eighty-four million, one hundred forty-four thousand, eight hundred forty-seven".