84646847 has 4 divisors (see below), whose sum is σ = 84784656. Its totient is φ = 84509040.

The previous prime is 84646819. The next prime is 84646879. The reversal of 84646847 is 74864648.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84646847 - 2²² = 80452543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84646547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67979 + ... + 69212.

It is an arithmetic number, because the mean of its divisors is an integer number (21196164).

Almost surely, 2^84646847 is an apocalyptic number.

84646847 is a deficient number, since it is larger than the sum of its proper divisors (137809).

84646847 is a wasteful number, since it uses less digits than its factorization.

84646847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137808.

The product of its digits is 1032192, while the sum is 47.

The square root of 84646847 is about 9200.3721120398. The cubic root of 84646847 is about 439.0731989820.

The spelling of 84646847 in words is "eighty-four million, six hundred forty-six thousand, eight hundred forty-seven".