861424873 has 2 divisors, whose sum is σ = 861424874. Its totient is φ = 861424872.

The previous prime is 861424853. The next prime is 861424913. The reversal of 861424873 is 378424168.

861424873 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 can be written as a sum of positive squares in only one way, i.e., 820937104 + 40487769 = 28652^2 + 6363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861424873 is a prime.

It is a super-2 number, since 2×861424873² = 1484105623646132258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (861424853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430712436 + 430712437.

It is an arithmetic number, because the mean of its divisors is an integer number (430712437).

Almost surely, 2^861424873 is an apocalyptic number.

It is an amenable number.

861424873 is a deficient number, since it is larger than the sum of its proper divisors (1).

861424873 is an equidigital number, since it uses as much as digits as its factorization.

861424873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The square root of 861424873 is about 29350.0404258665. The cubic root of 861424873 is about 951.4934489596.

The spelling of 861424873 in words is "eight hundred sixty-one million, four hundred twenty-four thousand, eight hundred seventy-three".