3984847 has 4 divisors (see below), whose sum is σ = 4001760. Its totient is φ = 3967936.

The previous prime is 3984823. The next prime is 3984859. The reversal of 3984847 is 7484893.

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 3984847 - 2¹⁵ = 3952079 is a prime.

It is a super-2 number, since 2×3984847² = 31758011226818, which contains 22 as substring.

It is a Duffinian number.

3984847 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3984047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8098 + ... + 8575.

It is an arithmetic number, because the mean of its divisors is an integer number (1000440).

Almost surely, 2^3984847 is an apocalyptic number.

3984847 is a deficient number, since it is larger than the sum of its proper divisors (16913).

3984847 is a wasteful number, since it uses less digits than its factorization.

3984847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16912.

The product of its digits is 193536, while the sum is 43.

The square root of 3984847 is about 1996.2081554788. The cubic root of 3984847 is about 158.5394024779.

It can be divided in two parts, 39 and 84847, that multiplied together give a palindrome (3309033).

The spelling of 3984847 in words is "three million, nine hundred eighty-four thousand, eight hundred forty-seven".