2031791 has 2 divisors, whose sum is σ = 2031792. Its totient is φ = 2031790.

The previous prime is 2031779. The next prime is 2031811. The reversal of 2031791 is 1971302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2031791 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031391) 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, 1015895 + 1015896.

It is an arithmetic number, because the mean of its divisors is an integer number (1015896).

2^2031791 is an apocalyptic number.

2031791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031791 is an equidigital number, since it uses as much as digits as its factorization.

2031791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 2031791 is about 1425.4090640935. The cubic root of 2031791 is about 126.6561679510.

The spelling of 2031791 in words is "two million, thirty-one thousand, seven hundred ninety-one".