84447447 has 16 divisors (see below), whose sum is σ = 129668352. Its totient is φ = 47885760.

The previous prime is 84447443. The next prime is 84447479. The reversal of 84447447 is 74474448.

It is not a de Polignac number, because 84447447 - 2² = 84447443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84447399 and 84447408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84447443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12598 + ... + 18099.

It is an arithmetic number, because the mean of its divisors is an integer number (8104272).

Almost surely, 2^84447447 is an apocalyptic number.

84447447 is a deficient number, since it is larger than the sum of its proper divisors (45220905).

84447447 is a wasteful number, since it uses less digits than its factorization.

84447447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30838.

The product of its digits is 401408, while the sum is 42.

The square root of 84447447 is about 9189.5292044805. The cubic root of 84447447 is about 438.7281574503.

The spelling of 84447447 in words is "eighty-four million, four hundred forty-seven thousand, four hundred forty-seven".