5681943 has 12 divisors (see below), whose sum is σ = 8564400. Its totient is φ = 3623136.

The previous prime is 5681939. The next prime is 5681947. The reversal of 5681943 is 3491865.

5681943 is a `hidden beast` number, since 568 + 1 + 94 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (5681939) and next prime (5681947).

It is not a de Polignac number, because 5681943 - 2² = 5681939 is a prime.

5681943 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5681898 and 5681907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681947) 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 11 ways as a sum of consecutive naturals, for example, 13518 + ... + 13931.

It is an arithmetic number, because the mean of its divisors is an integer number (713700).

Almost surely, 2^5681943 is an apocalyptic number.

5681943 is a deficient number, since it is larger than the sum of its proper divisors (2882457).

5681943 is a wasteful number, since it uses less digits than its factorization.

5681943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27478 (or 27475 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 5681943 is about 2383.6826550529. The cubic root of 5681943 is about 178.4427705337.

The spelling of 5681943 in words is "five million, six hundred eighty-one thousand, nine hundred forty-three".