84677647 has 8 divisors (see below), whose sum is σ = 87541760. Its totient is φ = 81821880.

The previous prime is 84677641. The next prime is 84677687. The reversal of 84677647 is 74677648.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84677647 is a prime.

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 84677647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84677641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23854 + ... + 27172.

It is an arithmetic number, because the mean of its divisors is an integer number (10942720).

Almost surely, 2^84677647 is an apocalyptic number.

84677647 is a deficient number, since it is larger than the sum of its proper divisors (2864113).

84677647 is a wasteful number, since it uses less digits than its factorization.

84677647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4173.

The product of its digits is 1580544, while the sum is 49.

The square root of 84677647 is about 9202.0458051457. The cubic root of 84677647 is about 439.1264469374.

Subtracting from 84677647 its reverse (74677648), we obtain a palindrome (9999999).

The spelling of 84677647 in words is "eighty-four million, six hundred seventy-seven thousand, six hundred forty-seven".