84439471 has 2 divisors, whose sum is σ = 84439472. Its totient is φ = 84439470.

The previous prime is 84439409. The next prime is 84439483. The reversal of 84439471 is 17493448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84439471 - 2¹⁵ = 84406703 is a prime.

It is a super-3 number, since 3×84439471³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84439171) 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, 42219735 + 42219736.

It is an arithmetic number, because the mean of its divisors is an integer number (42219736).

Almost surely, 2^84439471 is an apocalyptic number.

84439471 is a deficient number, since it is larger than the sum of its proper divisors (1).

84439471 is an equidigital number, since it uses as much as digits as its factorization.

84439471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 84439471 is about 9189.0952220553. The cubic root of 84439471 is about 438.7143444969.

The spelling of 84439471 in words is "eighty-four million, four hundred thirty-nine thousand, four hundred seventy-one".