3081891 has 8 divisors (see below), whose sum is σ = 4127760. Its totient is φ = 2045312.

The previous prime is 3081877. The next prime is 3081901. The reversal of 3081891 is 1981803.

3081891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3081891 - 2⁷ = 3081763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3081851) 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 7 ways as a sum of consecutive naturals, for example, 1506 + ... + 2903.

It is an arithmetic number, because the mean of its divisors is an integer number (515970).

Almost surely, 2^3081891 is an apocalyptic number.

3081891 is a deficient number, since it is larger than the sum of its proper divisors (1045869).

3081891 is a wasteful number, since it uses less digits than its factorization.

3081891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 3081891 is about 1755.5315434363. The cubic root of 3081891 is about 145.5254971200.

The spelling of 3081891 in words is "three million, eighty-one thousand, eight hundred ninety-one".