861424853 has 2 divisors, whose sum is σ = 861424854. Its totient is φ = 861424852.

The previous prime is 861424783. The next prime is 861424873. The reversal of 861424853 is 358424168.

861424853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 758341444 + 103083409 = 27538^2 + 10153^2 .

It is a cyclic number.

It is not a de Polignac number, because 861424853 - 2¹² = 861420757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 861424853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861424873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430712426 + 430712427.

It is an arithmetic number, because the mean of its divisors is an integer number (430712427).

Almost surely, 2^861424853 is an apocalyptic number.

It is an amenable number.

861424853 is a deficient number, since it is larger than the sum of its proper divisors (1).

861424853 is an equidigital number, since it uses as much as digits as its factorization.

861424853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 41.

The square root of 861424853 is about 29350.0400851515. The cubic root of 861424853 is about 951.4934415959.

The spelling of 861424853 in words is "eight hundred sixty-one million, four hundred twenty-four thousand, eight hundred fifty-three".