3189581 has 2 divisors, whose sum is σ = 3189582. Its totient is φ = 3189580.

The previous prime is 3189553. The next prime is 3189583. The reversal of 3189581 is 1859813.

3189581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2128681 + 1060900 = 1459^2 + 1030^2 .

It is an emirp because it is prime and its reverse (1859813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3189581 - 2⁶ = 3189517 is a prime.

It is a super-2 number, since 2×3189581² = 20346853911122, which contains 22 as substring.

Together with 3189583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3189583) 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 as a sum of consecutive naturals, namely, 1594790 + 1594791.

It is an arithmetic number, because the mean of its divisors is an integer number (1594791).

Almost surely, 2^3189581 is an apocalyptic number.

It is an amenable number.

3189581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3189581 is an equidigital number, since it uses as much as digits as its factorization.

3189581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 35.

The square root of 3189581 is about 1785.9398086162. The cubic root of 3189581 is about 147.2011530362.

The spelling of 3189581 in words is "three million, one hundred eighty-nine thousand, five hundred eighty-one".