2091247 has 2 divisors, whose sum is σ = 2091248. Its totient is φ = 2091246.

The previous prime is 2091241. The next prime is 2091251. The reversal of 2091247 is 7421902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2091247 - 2³ = 2091239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2091241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045623 + 1045624.

It is an arithmetic number, because the mean of its divisors is an integer number (1045624).

2^2091247 is an apocalyptic number.

2091247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091247 is an equidigital number, since it uses as much as digits as its factorization.

2091247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2091247 is about 1446.1144491360. The cubic root of 2091247 is about 127.8797495327.

The spelling of 2091247 in words is "two million, ninety-one thousand, two hundred forty-seven".