3107981 has 2 divisors, whose sum is σ = 3107982. Its totient is φ = 3107980.

The previous prime is 3107971. The next prime is 3107983. The reversal of 3107981 is 1897013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2706025 + 401956 = 1645^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 3107981 - 2¹⁸ = 2845837 is a prime.

It is a super-2 number, since 2×3107981² = 19319091792722, which contains 22 as substring.

Together with 3107983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3107983) 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, 1553990 + 1553991.

It is an arithmetic number, because the mean of its divisors is an integer number (1553991).

Almost surely, 2^3107981 is an apocalyptic number.

It is an amenable number.

3107981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3107981 is an equidigital number, since it uses as much as digits as its factorization.

3107981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 3107981 is about 1762.9466809861. The cubic root of 3107981 is about 145.9349963958.

The spelling of 3107981 in words is "three million, one hundred seven thousand, nine hundred eighty-one".