3116381 has 2 divisors, whose sum is σ = 3116382. Its totient is φ = 3116380.

The previous prime is 3116353. The next prime is 3116417. The reversal of 3116381 is 1836113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3115225 + 1156 = 1765^2 + 34^2 .

It is a cyclic number.

It is not a de Polignac number, because 3116381 - 2⁶ = 3116317 is a prime.

It is a super-2 number, since 2×3116381² = 19423661074322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3116341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1558190 + 1558191.

It is an arithmetic number, because the mean of its divisors is an integer number (1558191).

Almost surely, 2^3116381 is an apocalyptic number.

It is an amenable number.

3116381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3116381 is an equidigital number, since it uses as much as digits as its factorization.

3116381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 3116381 is about 1765.3274483789. The cubic root of 3116381 is about 146.0663519012.

The spelling of 3116381 in words is "three million, one hundred sixteen thousand, three hundred eighty-one".