84117447 has 10 divisors (see below), whose sum is σ = 125657048. Its totient is φ = 56078244.

The previous prime is 84117443. The next prime is 84117491. The reversal of 84117447 is 74471148.

It is not a de Polignac number, because 84117447 - 2² = 84117443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84117443) 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 in 9 ways as a sum of consecutive naturals, for example, 519163 + ... + 519324.

Almost surely, 2^84117447 is an apocalyptic number.

84117447 is a deficient number, since it is larger than the sum of its proper divisors (41539601).

84117447 is a wasteful number, since it uses less digits than its factorization.

84117447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038499 (or 1038490 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 84117447 is about 9171.5564109915. The cubic root of 84117447 is about 438.1559305949.

The spelling of 84117447 in words is "eighty-four million, one hundred seventeen thousand, four hundred forty-seven".