2005931 has 2 divisors, whose sum is σ = 2005932. Its totient is φ = 2005930.

The previous prime is 2005919. The next prime is 2005937. The reversal of 2005931 is 1395002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005931 is a prime.

It is a super-2 number, since 2×2005931² = 8047518353522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2005937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002965 + 1002966.

It is an arithmetic number, because the mean of its divisors is an integer number (1002966).

2^2005931 is an apocalyptic number.

2005931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005931 is an equidigital number, since it uses as much as digits as its factorization.

2005931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 2005931 is about 1416.3089352256. The cubic root of 2005931 is about 126.1165252767.

The spelling of 2005931 in words is "two million, five thousand, nine hundred thirty-one".