3608981 has 4 divisors (see below), whose sum is σ = 3821292. Its totient is φ = 3396672.

The previous prime is 3608977. The next prime is 3609007. The reversal of 3608981 is 1898063.

3608981 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2588881 + 1020100 = 1609^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 3608981 - 2² = 3608977 is a prime.

It is a super-2 number, since 2×3608981² = 26049487716722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3608921) 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, 106130 + ... + 106163.

It is an arithmetic number, because the mean of its divisors is an integer number (955323).

Almost surely, 2^3608981 is an apocalyptic number.

It is an amenable number.

3608981 is a deficient number, since it is larger than the sum of its proper divisors (212311).

3608981 is a wasteful number, since it uses less digits than its factorization.

3608981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212310.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 3608981 is about 1899.7318231793. The cubic root of 3608981 is about 153.3892292537.

The spelling of 3608981 in words is "three million, six hundred eight thousand, nine hundred eighty-one".