3081289 has 4 divisors (see below), whose sum is σ = 3086100. Its totient is φ = 3076480.

The previous prime is 3081271. The next prime is 3081311. The reversal of 3081289 is 9821803.

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 242064 + 2839225 = 492^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 3081289 - 2⁷ = 3081161 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3081289.

It is not an unprimeable number, because it can be changed into a prime (3081259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264 + ... + 2785.

It is an arithmetic number, because the mean of its divisors is an integer number (771525).

Almost surely, 2^3081289 is an apocalyptic number.

It is an amenable number.

3081289 is a deficient number, since it is larger than the sum of its proper divisors (4811).

3081289 is an equidigital number, since it uses as much as digits as its factorization.

3081289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 3081289 is about 1755.3600770212. The cubic root of 3081289 is about 145.5160211139.

The spelling of 3081289 in words is "three million, eighty-one thousand, two hundred eighty-nine".