2091847 has 2 divisors, whose sum is σ = 2091848. Its totient is φ = 2091846.

The previous prime is 2091839. The next prime is 2091851. The reversal of 2091847 is 7481902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2091847 - 2³ = 2091839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2091877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045923 + 1045924.

It is an arithmetic number, because the mean of its divisors is an integer number (1045924).

2^2091847 is an apocalyptic number.

2091847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091847 is an equidigital number, since it uses as much as digits as its factorization.

2091847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2091847 is about 1446.3218867182. The cubic root of 2091847 is about 127.8919783628.

The spelling of 2091847 in words is "two million, ninety-one thousand, eight hundred forty-seven".