5681493 has 24 divisors (see below), whose sum is σ = 8550360. Its totient is φ = 3632640.

The previous prime is 5681471. The next prime is 5681497. The reversal of 5681493 is 3941865.

5681493 is a `hidden beast` number, since 568 + 1 + 4 + 93 = 666.

5681493 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 191844 + 5489649 = 438^2 + 2343^2 .

It is not a de Polignac number, because 5681493 - 2⁸ = 5681237 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32755 + ... + 32927.

It is an arithmetic number, because the mean of its divisors is an integer number (356265).

Almost surely, 2^5681493 is an apocalyptic number.

It is an amenable number.

5681493 is a deficient number, since it is larger than the sum of its proper divisors (2868867).

5681493 is a wasteful number, since it uses less digits than its factorization.

5681493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 306 counting only the distinct ones).

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

The square root of 5681493 is about 2383.5882614244. The cubic root of 5681493 is about 178.4380596237.

The spelling of 5681493 in words is "five million, six hundred eighty-one thousand, four hundred ninety-three".