2840237 has 2 divisors, whose sum is σ = 2840238. Its totient is φ = 2840236.

The previous prime is 2840209. The next prime is 2840239. The reversal of 2840237 is 7320482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2157961 + 682276 = 1469^2 + 826^2 .

It is a cyclic number.

It is not a de Polignac number, because 2840237 - 2⁸ = 2839981 is a prime.

Together with 2840239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2840239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1420118 + 1420119.

It is an arithmetic number, because the mean of its divisors is an integer number (1420119).

2^2840237 is an apocalyptic number.

It is an amenable number.

2840237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2840237 is an equidigital number, since it uses as much as digits as its factorization.

2840237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 2840237 is about 1685.3002699816. The cubic root of 2840237 is about 141.6179141741.

The spelling of 2840237 in words is "two million, eight hundred forty thousand, two hundred thirty-seven".