4947839 has 8 divisors (see below), whose sum is σ = 5458992. Its totient is φ = 4455360.

The previous prime is 4947821. The next prime is 4947841. The reversal of 4947839 is 9387494.

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

It is a de Polignac number, because none of the positive numbers 2^k-4947839 is a prime.

It is a super-2 number, since 2×4947839² = 48962221539842, which contains 22 as substring.

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 4947839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4917839) 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, 4109 + ... + 5174.

It is an arithmetic number, because the mean of its divisors is an integer number (682374).

Almost surely, 2^4947839 is an apocalyptic number.

4947839 is a deficient number, since it is larger than the sum of its proper divisors (511153).

4947839 is a wasteful number, since it uses less digits than its factorization.

4947839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9337.

The product of its digits is 217728, while the sum is 44.

The square root of 4947839 is about 2224.3738444785. The cubic root of 4947839 is about 170.4008878079.

The spelling of 4947839 in words is "four million, nine hundred forty-seven thousand, eight hundred thirty-nine".