2087791 has 2 divisors, whose sum is σ = 2087792. Its totient is φ = 2087790.

The previous prime is 2087773. The next prime is 2087801. The reversal of 2087791 is 1977802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2087791 - 2⁵ = 2087759 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2087711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043895 + 1043896.

It is an arithmetic number, because the mean of its divisors is an integer number (1043896).

2^2087791 is an apocalyptic number.

2087791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2087791 is an equidigital number, since it uses as much as digits as its factorization.

2087791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 2087791 is about 1444.9190288732. The cubic root of 2087791 is about 127.8092658938.

The spelling of 2087791 in words is "two million, eighty-seven thousand, seven hundred ninety-one".