84000447 has 6 divisors (see below), whose sum is σ = 121333992. Its totient is φ = 56000292.

The previous prime is 84000437. The next prime is 84000473. The reversal of 84000447 is 74400048.

It is not a de Polignac number, because 84000447 - 2¹⁰ = 83999423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84000447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84000407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4666683 + ... + 4666700.

It is an arithmetic number, because the mean of its divisors is an integer number (20222332).

Almost surely, 2^84000447 is an apocalyptic number.

84000447 is a deficient number, since it is larger than the sum of its proper divisors (37333545).

84000447 is a wasteful number, since it uses less digits than its factorization.

84000447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9333389 (or 9333386 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 84000447 is about 9165.1757757285. The cubic root of 84000447 is about 437.9526908307.

The spelling of 84000447 in words is "eighty-four million, four hundred forty-seven", and thus it is an aban number.