852561139 has 2 divisors, whose sum is σ = 852561140. Its totient is φ = 852561138.

The previous prime is 852561133. The next prime is 852561167. The reversal of 852561139 is 931165258.

852561139 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 852561139 - 2¹¹ = 852559091 is a prime.

It is not a weakly prime, because it can be changed into another prime (852561133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426280569 + 426280570.

It is an arithmetic number, because the mean of its divisors is an integer number (426280570).

Almost surely, 2^852561139 is an apocalyptic number.

852561139 is a deficient number, since it is larger than the sum of its proper divisors (1).

852561139 is an equidigital number, since it uses as much as digits as its factorization.

852561139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 852561139 is about 29198.6496091857. The cubic root of 852561139 is about 948.2186893479.

The spelling of 852561139 in words is "eight hundred fifty-two million, five hundred sixty-one thousand, one hundred thirty-nine".