858138443 has 2 divisors, whose sum is σ = 858138444. Its totient is φ = 858138442.

The previous prime is 858138431. The next prime is 858138469. The reversal of 858138443 is 344831858.

858138443 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 858138443 - 2¹⁰ = 858137419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 858138394 and 858138403.

It is not a weakly prime, because it can be changed into another prime (858138473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429069221 + 429069222.

It is an arithmetic number, because the mean of its divisors is an integer number (429069222).

Almost surely, 2^858138443 is an apocalyptic number.

858138443 is a deficient number, since it is larger than the sum of its proper divisors (1).

858138443 is an equidigital number, since it uses as much as digits as its factorization.

858138443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368640, while the sum is 44.

The square root of 858138443 is about 29294.0001194784. Note that the first 3 decimals coincide. The cubic root of 858138443 is about 950.2818897549.

The spelling of 858138443 in words is "eight hundred fifty-eight million, one hundred thirty-eight thousand, four hundred forty-three".