4394939 has 4 divisors (see below), whose sum is σ = 4421424. Its totient is φ = 4368456.

The previous prime is 4394927. The next prime is 4394983. The reversal of 4394939 is 9394934.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9394934 = 2 ⋅4697467.

It is a cyclic number.

It is not a de Polignac number, because 4394939 - 2²⁰ = 3346363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4394896 and 4394905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4394639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12992 + ... + 13325.

It is an arithmetic number, because the mean of its divisors is an integer number (1105356).

Almost surely, 2^4394939 is an apocalyptic number.

4394939 is a deficient number, since it is larger than the sum of its proper divisors (26485).

4394939 is a wasteful number, since it uses less digits than its factorization.

4394939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26484.

The product of its digits is 104976, while the sum is 41.

The square root of 4394939 is about 2096.4109807001. The cubic root of 4394939 is about 163.8014029716.

The spelling of 4394939 in words is "four million, three hundred ninety-four thousand, nine hundred thirty-nine".