3681533 has 4 divisors (see below), whose sum is σ = 3741948. Its totient is φ = 3621120.

The previous prime is 3681527. The next prime is 3681553. The reversal of 3681533 is 3351863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3351863 = 811 ⋅4133.

It can be written as a sum of positive squares in 2 ways, for example, as 158404 + 3523129 = 398^2 + 1877^2 .

It is a cyclic number.

It is not a de Polignac number, because 3681533 - 2⁸ = 3681277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3681496 and 3681505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681523) 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 3 ways as a sum of consecutive naturals, for example, 30116 + ... + 30237.

It is an arithmetic number, because the mean of its divisors is an integer number (935487).

Almost surely, 2^3681533 is an apocalyptic number.

It is an amenable number.

3681533 is a deficient number, since it is larger than the sum of its proper divisors (60415).

3681533 is an equidigital number, since it uses as much as digits as its factorization.

3681533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60414.

The product of its digits is 6480, while the sum is 29.

The square root of 3681533 is about 1918.7321334673. The cubic root of 3681533 is about 154.4102878457.

The spelling of 3681533 in words is "three million, six hundred eighty-one thousand, five hundred thirty-three".