84447647 has 12 divisors (see below), whose sum is σ = 89611200. Its totient is φ = 79568352.

The previous prime is 84447617. The next prime is 84447667. The reversal of 84447647 is 74674448.

It is a happy number.

It is not a de Polignac number, because 84447647 - 2¹⁰ = 84446623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84447598 and 84447607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84447617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79979 + ... + 81027.

It is an arithmetic number, because the mean of its divisors is an integer number (7467600).

Almost surely, 2^84447647 is an apocalyptic number.

84447647 is a deficient number, since it is larger than the sum of its proper divisors (5163553).

84447647 is a wasteful number, since it uses less digits than its factorization.

84447647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310 (or 1291 counting only the distinct ones).

The product of its digits is 602112, while the sum is 44.

The square root of 84447647 is about 9189.5400864243. The cubic root of 84447647 is about 438.7285038020.

The spelling of 84447647 in words is "eighty-four million, four hundred forty-seven thousand, six hundred forty-seven".