3119681 has 2 divisors, whose sum is σ = 3119682. Its totient is φ = 3119680.

The previous prime is 3119663. The next prime is 3119707. The reversal of 3119681 is 1869113.

It is a happy number.

3119681 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 can be written as a sum of positive squares in only one way, i.e., 3094081 + 25600 = 1759^2 + 160^2 .

It is an emirp because it is prime and its reverse (1869113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3119681 - 2¹⁰ = 3118657 is a prime.

It is a super-2 number, since 2×3119681² = 19464819083522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3119981) 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, 1559840 + 1559841.

It is an arithmetic number, because the mean of its divisors is an integer number (1559841).

Almost surely, 2^3119681 is an apocalyptic number.

It is an amenable number.

3119681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3119681 is an equidigital number, since it uses as much as digits as its factorization.

3119681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 29.

The square root of 3119681 is about 1766.2618718639. The cubic root of 3119681 is about 146.1178912692.

The spelling of 3119681 in words is "three million, one hundred nineteen thousand, six hundred eighty-one".