3188989 has 2 divisors, whose sum is σ = 3188990. Its totient is φ = 3188988.

The previous prime is 3188987. The next prime is 3189007. The reversal of 3188989 is 9898813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2722500 + 466489 = 1650^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 3188989 - 2¹ = 3188987 is a prime.

Together with 3188987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3188981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1594494 + 1594495.

It is an arithmetic number, because the mean of its divisors is an integer number (1594495).

Almost surely, 2^3188989 is an apocalyptic number.

It is an amenable number.

3188989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3188989 is an equidigital number, since it uses as much as digits as its factorization.

3188989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 3188989 is about 1785.7740618567. The cubic root of 3188989 is about 147.1920454163.

The spelling of 3188989 in words is "three million, one hundred eighty-eight thousand, nine hundred eighty-nine".