3128849 has 2 divisors, whose sum is σ = 3128850. Its totient is φ = 3128848.

The previous prime is 3128843. The next prime is 3128869. The reversal of 3128849 is 9488213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3125824 + 3025 = 1768^2 + 55^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3128849 is a prime.

It is not a weakly prime, because it can be changed into another prime (3128843) by changing a digit.

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 as a sum of consecutive naturals, namely, 1564424 + 1564425.

It is an arithmetic number, because the mean of its divisors is an integer number (1564425).

Almost surely, 2^3128849 is an apocalyptic number.

It is an amenable number.

3128849 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128849 is an equidigital number, since it uses as much as digits as its factorization.

3128849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 3128849 is about 1768.8552795523. The cubic root of 3128849 is about 146.2608865201.

The spelling of 3128849 in words is "three million, one hundred twenty-eight thousand, eight hundred forty-nine".