3138881 has 2 divisors, whose sum is σ = 3138882. Its totient is φ = 3138880.

The previous prime is 3138869. The next prime is 3138893. The reversal of 3138881 is 1888313.

It is a balanced prime because it is at equal distance from previous prime (3138869) and next prime (3138893).

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 1343281 = 1340^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 3138881 - 2¹⁰ = 3137857 is a prime.

It is a super-2 number, since 2×3138881² = 19705147864322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3138851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569440 + 1569441.

It is an arithmetic number, because the mean of its divisors is an integer number (1569441).

Almost surely, 2^3138881 is an apocalyptic number.

It is an amenable number.

3138881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3138881 is an equidigital number, since it uses as much as digits as its factorization.

3138881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 3138881 is about 1771.6887424150. The cubic root of 3138881 is about 146.4170380650.

The spelling of 3138881 in words is "three million, one hundred thirty-eight thousand, eight hundred eighty-one".