3661893 has 12 divisors (see below), whose sum is σ = 5306028. Its totient is φ = 2433600.

The previous prime is 3661871. The next prime is 3661907. The reversal of 3661893 is 3981663.

It is a happy number.

3661893 is a `hidden beast` number, since 36 + 618 + 9 + 3 = 666.

3661893 is digitally balanced in base 2, 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 2 ways, for example, as 3448449 + 213444 = 1857^2 + 462^2 .

It is not a de Polignac number, because 3661893 - 2⁹ = 3661381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661093) 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 11 ways as a sum of consecutive naturals, for example, 5071 + ... + 5747.

It is an arithmetic number, because the mean of its divisors is an integer number (442169).

Almost surely, 2^3661893 is an apocalyptic number.

It is an amenable number.

3661893 is a deficient number, since it is larger than the sum of its proper divisors (1644135).

3661893 is a wasteful number, since it uses less digits than its factorization.

3661893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284 (or 1281 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 3661893 is about 1913.6073264910. The cubic root of 3661893 is about 154.1352188432.

It can be divided in two parts, 3661 and 893, that added together give a palindrome (4554).

The spelling of 3661893 in words is "three million, six hundred sixty-one thousand, eight hundred ninety-three".