5681867 has 4 divisors (see below), whose sum is σ = 5687640. Its totient is φ = 5676096.

The previous prime is 5681861. The next prime is 5681869. The reversal of 5681867 is 7681865.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7681865 = 5 ⋅1536373.

It is a cyclic number.

It is not a de Polignac number, because 5681867 - 2⁶ = 5681803 is a prime.

It is a super-2 number, since 2×5681867² = 64567225211378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5681861) 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, 998 + ... + 3515.

It is an arithmetic number, because the mean of its divisors is an integer number (1421910).

Almost surely, 2^5681867 is an apocalyptic number.

5681867 is a deficient number, since it is larger than the sum of its proper divisors (5773).

5681867 is a wasteful number, since it uses less digits than its factorization.

5681867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5772.

The product of its digits is 80640, while the sum is 41.

The square root of 5681867 is about 2383.6667132802. Note that the first 3 decimals coincide. The cubic root of 5681867 is about 178.4419749308.

The spelling of 5681867 in words is "five million, six hundred eighty-one thousand, eight hundred sixty-seven".