2057791 has 2 divisors, whose sum is σ = 2057792. Its totient is φ = 2057790.

The previous prime is 2057779. The next prime is 2057807. The reversal of 2057791 is 1977502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2057791 - 2¹⁹ = 1533503 is a prime.

It is an Ulam number.

It is the 1435-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2057701) by changing a digit.

It is a nontrivial repunit in base 1434.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028895 + 1028896.

It is an arithmetic number, because the mean of its divisors is an integer number (1028896).

2^2057791 is an apocalyptic number.

2057791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2057791 is an equidigital number, since it uses as much as digits as its factorization.

2057791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 2057791 is about 1434.5002614151. The cubic root of 2057791 is about 127.1941354772.

The spelling of 2057791 in words is "two million, fifty-seven thousand, seven hundred ninety-one".