5681637 has 16 divisors (see below), whose sum is σ = 9065280. Its totient is φ = 3496176.

The previous prime is 5681629. The next prime is 5681647. The reversal of 5681637 is 7361865.

It is not a de Polignac number, because 5681637 - 2³ = 5681629 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7743 + ... + 8444.

It is an arithmetic number, because the mean of its divisors is an integer number (566580).

Almost surely, 2^5681637 is an apocalyptic number.

It is an amenable number.

5681637 is a deficient number, since it is larger than the sum of its proper divisors (3383643).

5681637 is a wasteful number, since it uses less digits than its factorization.

5681637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16209 (or 16203 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 5681637 is about 2383.6184677922. The cubic root of 5681637 is about 178.4395671419.

The spelling of 5681637 in words is "five million, six hundred eighty-one thousand, six hundred thirty-seven".