2820557939 has 2 divisors, whose sum is σ = 2820557940. Its totient is φ = 2820557938.

The previous prime is 2820557917. The next prime is 2820557959. The reversal of 2820557939 is 9397550282.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2820557939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2820557959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410278969 + 1410278970.

It is an arithmetic number, because the mean of its divisors is an integer number (1410278970).

Almost surely, 2^2820557939 is an apocalyptic number.

2820557939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820557939 is an equidigital number, since it uses as much as digits as its factorization.

2820557939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 2820557939 is about 53108.9252291929. The cubic root of 2820557939 is about 1412.9008132280.

The spelling of 2820557939 in words is "two billion, eight hundred twenty million, five hundred fifty-seven thousand, nine hundred thirty-nine".