3681897 has 4 divisors (see below), whose sum is σ = 4909200. Its totient is φ = 2454596.

The previous prime is 3681889. The next prime is 3681917. The reversal of 3681897 is 7981863.

3681897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7981863 = 3 ⋅2660621.

It is a cyclic number.

It is not a de Polignac number, because 3681897 - 2³ = 3681889 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3681827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613647 + ... + 613652.

It is an arithmetic number, because the mean of its divisors is an integer number (1227300).

Almost surely, 2^3681897 is an apocalyptic number.

It is an amenable number.

3681897 is a deficient number, since it is larger than the sum of its proper divisors (1227303).

3681897 is a wasteful number, since it uses less digits than its factorization.

3681897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227302.

The product of its digits is 72576, while the sum is 42.

The square root of 3681897 is about 1918.8269854263. The cubic root of 3681897 is about 154.4153766219.

The spelling of 3681897 in words is "three million, six hundred eighty-one thousand, eight hundred ninety-seven".