3148991 has 2 divisors, whose sum is σ = 3148992. Its totient is φ = 3148990.

The previous prime is 3148987. The next prime is 3148993. The reversal of 3148991 is 1998413.

3148991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1998413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3148991 - 2² = 3148987 is a prime.

It is a super-2 number, since 2×3148991² = 19832288636162, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3148993, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3148993) 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, 1574495 + 1574496.

It is an arithmetic number, because the mean of its divisors is an integer number (1574496).

Almost surely, 2^3148991 is an apocalyptic number.

3148991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3148991 is an equidigital number, since it uses as much as digits as its factorization.

3148991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 3148991 is about 1774.5396586157. The cubic root of 3148991 is about 146.5740674673.

The spelling of 3148991 in words is "three million, one hundred forty-eight thousand, nine hundred ninety-one".