5681839 has 4 divisors (see below), whose sum is σ = 5714856. Its totient is φ = 5648824.

The previous prime is 5681803. The next prime is 5681861. The reversal of 5681839 is 9381865.

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: 9381865 = 5 ⋅1876373.

It is a cyclic number.

It is not a de Polignac number, because 5681839 - 2⁹ = 5681327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681869) 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, 16249 + ... + 16594.

It is an arithmetic number, because the mean of its divisors is an integer number (1428714).

Almost surely, 2^5681839 is an apocalyptic number.

5681839 is a deficient number, since it is larger than the sum of its proper divisors (33017).

5681839 is a wasteful number, since it uses less digits than its factorization.

5681839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33016.

The product of its digits is 51840, while the sum is 40.

The square root of 5681839 is about 2383.6608399686. The cubic root of 5681839 is about 178.4416818121.

The spelling of 5681839 in words is "five million, six hundred eighty-one thousand, eight hundred thirty-nine".