4947647 has 4 divisors (see below), whose sum is σ = 4966176. Its totient is φ = 4929120.

The previous prime is 4947617. The next prime is 4947653. The reversal of 4947647 is 7467494.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4947647 is a prime.

It is a d-powerful number, because it can be written as 4 + 9⁷ + 4³ + 7² + 6⁶ + 4⁴ + 7⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4947617) 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, 8858 + ... + 9399.

It is an arithmetic number, because the mean of its divisors is an integer number (1241544).

Almost surely, 2^4947647 is an apocalyptic number.

4947647 is a deficient number, since it is larger than the sum of its proper divisors (18529).

4947647 is a wasteful number, since it uses less digits than its factorization.

4947647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18528.

The product of its digits is 169344, while the sum is 41.

The square root of 4947647 is about 2224.3306858469. The cubic root of 4947647 is about 170.3986836542.

The spelling of 4947647 in words is "four million, nine hundred forty-seven thousand, six hundred forty-seven".