3186881 has 2 divisors, whose sum is σ = 3186882. Its totient is φ = 3186880.

The previous prime is 3186877. The next prime is 3186899. The reversal of 3186881 is 1886813.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3182656 + 4225 = 1784^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 3186881 - 2² = 3186877 is a prime.

It is a super-2 number, since 2×3186881² = 20312421016322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3186481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1593440 + 1593441.

It is an arithmetic number, because the mean of its divisors is an integer number (1593441).

Almost surely, 2^3186881 is an apocalyptic number.

It is an amenable number.

3186881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3186881 is an equidigital number, since it uses as much as digits as its factorization.

3186881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 35.

The square root of 3186881 is about 1785.1837440443. The cubic root of 3186881 is about 147.1596057492.

The spelling of 3186881 in words is "three million, one hundred eighty-six thousand, eight hundred eighty-one".