839621161 has 2 divisors, whose sum is σ = 839621162. Its totient is φ = 839621160.

The previous prime is 839621149. The next prime is 839621183. The reversal of 839621161 is 161126938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501760000 + 337861161 = 22400^2 + 18381^2 .

It is a cyclic number.

It is not a de Polignac number, because 839621161 - 2⁵ = 839621129 is a prime.

It is a Chen prime.

It is equal to p_43076863 and since 839621161 and 43076863 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 839621161.

It is not a weakly prime, because it can be changed into another prime (839621261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419810580 + 419810581.

It is an arithmetic number, because the mean of its divisors is an integer number (419810581).

Almost surely, 2^839621161 is an apocalyptic number.

It is an amenable number.

839621161 is a deficient number, since it is larger than the sum of its proper divisors (1).

839621161 is an equidigital number, since it uses as much as digits as its factorization.

839621161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 839621161 is about 28976.2171616655. The cubic root of 839621161 is about 943.3969297761.

The spelling of 839621161 in words is "eight hundred thirty-nine million, six hundred twenty-one thousand, one hundred sixty-one".