2120340839 has 2 divisors, whose sum is σ = 2120340840. Its totient is φ = 2120340838.

The previous prime is 2120340811. The next prime is 2120340863. The reversal of 2120340839 is 9380430212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120340839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120340809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060170419 + 1060170420.

It is an arithmetic number, because the mean of its divisors is an integer number (1060170420).

Almost surely, 2^2120340839 is an apocalyptic number.

2120340839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120340839 is an equidigital number, since it uses as much as digits as its factorization.

2120340839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2120340839 is about 46047.1588591522. The cubic root of 2120340839 is about 1284.7004987670.

The spelling of 2120340839 in words is "two billion, one hundred twenty million, three hundred forty thousand, eight hundred thirty-nine".