3613945 has 24 divisors (see below), whose sum is σ = 4796568. Its totient is φ = 2611200.

The previous prime is 3613931. The next prime is 3613957. The reversal of 3613945 is 5493163.

It can be written as a sum of positive squares in 12 ways, for example, as 1687401 + 1926544 = 1299^2 + 1388^2 .

It is not a de Polignac number, because 3613945 - 2⁹ = 3613433 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 59215 + ... + 59275.

It is an arithmetic number, because the mean of its divisors is an integer number (199857).

Almost surely, 2^3613945 is an apocalyptic number.

It is an amenable number.

3613945 is a deficient number, since it is larger than the sum of its proper divisors (1182623).

3613945 is a wasteful number, since it uses less digits than its factorization.

3613945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 124 counting only the distinct ones).

The product of its digits is 9720, while the sum is 31.

The square root of 3613945 is about 1901.0378744254. The cubic root of 3613945 is about 153.4595238233.

The spelling of 3613945 in words is "three million, six hundred thirteen thousand, nine hundred forty-five".