2840939 has 2 divisors, whose sum is σ = 2840940. Its totient is φ = 2840938.

The previous prime is 2840917. The next prime is 2840951. The reversal of 2840939 is 9390482.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2840939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2840899 and 2840908.

It is not a weakly prime, because it can be changed into another prime (2840039) 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, 1420469 + 1420470.

It is an arithmetic number, because the mean of its divisors is an integer number (1420470).

2^2840939 is an apocalyptic number.

2840939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2840939 is an equidigital number, since it uses as much as digits as its factorization.

2840939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2840939 is about 1685.5085286049. The cubic root of 2840939 is about 141.6295807576.

The spelling of 2840939 in words is "two million, eight hundred forty thousand, nine hundred thirty-nine".