3158891 has 2 divisors, whose sum is σ = 3158892. Its totient is φ = 3158890.

The previous prime is 3158887. The next prime is 3158933. The reversal of 3158891 is 1988513.

3158891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1988513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3158891 - 2² = 3158887 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3158851) 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, 1579445 + 1579446.

It is an arithmetic number, because the mean of its divisors is an integer number (1579446).

Almost surely, 2^3158891 is an apocalyptic number.

3158891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3158891 is an equidigital number, since it uses as much as digits as its factorization.

3158891 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 3158891 is about 1777.3269254698. The cubic root of 3158891 is about 146.7275097656.

The spelling of 3158891 in words is "three million, one hundred fifty-eight thousand, eight hundred ninety-one".