84047447 has 24 divisors (see below), whose sum is σ = 95983440. Its totient is φ = 73497600.

The previous prime is 84047443. The next prime is 84047459. The reversal of 84047447 is 74474048.

It is a happy number.

It is not a de Polignac number, because 84047447 - 2² = 84047443 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84047447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84047441) 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 23 ways as a sum of consecutive naturals, for example, 435383 + ... + 435575.

It is an arithmetic number, because the mean of its divisors is an integer number (3999310).

Almost surely, 2^84047447 is an apocalyptic number.

84047447 is a deficient number, since it is larger than the sum of its proper divisors (11935993).

84047447 is a wasteful number, since it uses less digits than its factorization.

84047447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 38.

The square root of 84047447 is about 9167.7394705565. The cubic root of 84047447 is about 438.0343568193.

It can be divided in two parts, 8404 and 7447, that added together give a palindrome (15851).

The spelling of 84047447 in words is "eighty-four million, forty-seven thousand, four hundred forty-seven".