5681687 has 4 divisors (see below), whose sum is σ = 6198216. Its totient is φ = 5165160.

The previous prime is 5681647. The next prime is 5681693. The reversal of 5681687 is 7861865.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5681687 - 2⁶ = 5681623 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 (5681617) 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, 258248 + ... + 258269.

It is an arithmetic number, because the mean of its divisors is an integer number (1549554).

Almost surely, 2^5681687 is an apocalyptic number.

5681687 is a deficient number, since it is larger than the sum of its proper divisors (516529).

5681687 is a wasteful number, since it uses less digits than its factorization.

5681687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516528.

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

The square root of 5681687 is about 2383.6289560248. The cubic root of 5681687 is about 178.4400905798.

The spelling of 5681687 in words is "five million, six hundred eighty-one thousand, six hundred eighty-seven".