3681613 has 8 divisors (see below), whose sum is σ = 3990168. Its totient is φ = 3376704.

The previous prime is 3681599. The next prime is 3681619. The reversal of 3681613 is 3161863.

3681613 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 4 ways, for example, as 64009 + 3617604 = 253^2 + 1902^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3681613 - 2¹⁷ = 3550541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681619) 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 7 ways as a sum of consecutive naturals, for example, 1431 + ... + 3067.

It is an arithmetic number, because the mean of its divisors is an integer number (498771).

Almost surely, 2^3681613 is an apocalyptic number.

It is an amenable number.

3681613 is a deficient number, since it is larger than the sum of its proper divisors (308555).

3681613 is a wasteful number, since it uses less digits than its factorization.

3681613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823.

The product of its digits is 2592, while the sum is 28.

The square root of 3681613 is about 1918.7529804537. The cubic root of 3681613 is about 154.4114062868.

The spelling of 3681613 in words is "three million, six hundred eighty-one thousand, six hundred thirteen".