4939643 has 4 divisors (see below), whose sum is σ = 4975320. Its totient is φ = 4903968.

The previous prime is 4939637. The next prime is 4939661. The reversal of 4939643 is 3469394.

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 4939643 - 2⁸ = 4939387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4939597 and 4939606.

It is not an unprimeable number, because it can be changed into a prime (4939243) 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, 17630 + ... + 17907.

It is an arithmetic number, because the mean of its divisors is an integer number (1243830).

Almost surely, 2^4939643 is an apocalyptic number.

4939643 is a deficient number, since it is larger than the sum of its proper divisors (35677).

4939643 is a wasteful number, since it uses less digits than its factorization.

4939643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35676.

The product of its digits is 69984, while the sum is 38.

The square root of 4939643 is about 2222.5307646915. The cubic root of 4939643 is about 170.3067472119.

The spelling of 4939643 in words is "four million, nine hundred thirty-nine thousand, six hundred forty-three".