2161385339 has 2 divisors, whose sum is σ = 2161385340. Its totient is φ = 2161385338.

The previous prime is 2161385323. The next prime is 2161385357. The reversal of 2161385339 is 9335831612.

It is a happy number.

2161385339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2161385339 - 2⁴ = 2161385323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2161385296 and 2161385305.

It is not a weakly prime, because it can be changed into another prime (2161384339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080692669 + 1080692670.

It is an arithmetic number, because the mean of its divisors is an integer number (1080692670).

Almost surely, 2^2161385339 is an apocalyptic number.

2161385339 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161385339 is an equidigital number, since it uses as much as digits as its factorization.

2161385339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 2161385339 is about 46490.7016402205. The cubic root of 2161385339 is about 1292.9371088852.

The spelling of 2161385339 in words is "two billion, one hundred sixty-one million, three hundred eighty-five thousand, three hundred thirty-nine".