2820239 has 2 divisors, whose sum is σ = 2820240. Its totient is φ = 2820238.

The previous prime is 2820229. The next prime is 2820263. The reversal of 2820239 is 9320282.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2820239 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2820229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410119 + 1410120.

It is an arithmetic number, because the mean of its divisors is an integer number (1410120).

2^2820239 is an apocalyptic number.

2820239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820239 is an equidigital number, since it uses as much as digits as its factorization.

2820239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2820239 is about 1679.3567220814. The cubic root of 2820239 is about 141.2847555898.

The spelling of 2820239 in words is "two million, eight hundred twenty thousand, two hundred thirty-nine".