2019939161 has 2 divisors, whose sum is σ = 2019939162. Its totient is φ = 2019939160.

The previous prime is 2019939157. The next prime is 2019939179. The reversal of 2019939161 is 1619399102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1471489600 + 548449561 = 38360^2 + 23419^2 .

It is a cyclic number.

It is not a de Polignac number, because 2019939161 - 2² = 2019939157 is a prime.

It is not a weakly prime, because it can be changed into another prime (2019939121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009969580 + 1009969581.

It is an arithmetic number, because the mean of its divisors is an integer number (1009969581).

Almost surely, 2^2019939161 is an apocalyptic number.

It is an amenable number.

2019939161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019939161 is an equidigital number, since it uses as much as digits as its factorization.

2019939161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 2019939161 is about 44943.7332784004. The cubic root of 2019939161 is about 1264.0941738122.

The spelling of 2019939161 in words is "two billion, nineteen million, nine hundred thirty-nine thousand, one hundred sixty-one".