105842839 has 2 divisors, whose sum is σ = 105842840. Its totient is φ = 105842838.

The previous prime is 105842819. The next prime is 105842851. The reversal of 105842839 is 938248501.

It is a strong prime.

It is an emirp because it is prime and its reverse (938248501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105842839 - 2¹⁵ = 105810071 is a prime.

It is a super-2 number, since 2×105842839² = 22405413135159842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105842809) 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, 52921419 + 52921420.

It is an arithmetic number, because the mean of its divisors is an integer number (52921420).

Almost surely, 2^105842839 is an apocalyptic number.

105842839 is a deficient number, since it is larger than the sum of its proper divisors (1).

105842839 is an equidigital number, since it uses as much as digits as its factorization.

105842839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 105842839 is about 10287.9948969661. The cubic root of 105842839 is about 473.0283391370.

The spelling of 105842839 in words is "one hundred five million, eight hundred forty-two thousand, eight hundred thirty-nine".