105842189 has 4 divisors (see below), whose sum is σ = 107292156. Its totient is φ = 104392224.

The previous prime is 105842183. The next prime is 105842201. The reversal of 105842189 is 981248501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 981248501 = 61 ⋅16086041.

It can be written as a sum of positive squares in 2 ways, for example, as 51008164 + 54834025 = 7142^2 + 7405^2 .

It is a cyclic number.

It is not a de Polignac number, because 105842189 - 2⁴ = 105842173 is a prime.

It is a super-2 number, since 2×105842189² = 22405137944623442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105842183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724874 + ... + 725019.

It is an arithmetic number, because the mean of its divisors is an integer number (26823039).

Almost surely, 2^105842189 is an apocalyptic number.

It is an amenable number.

105842189 is a deficient number, since it is larger than the sum of its proper divisors (1449967).

105842189 is an equidigital number, since it uses as much as digits as its factorization.

105842189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449966.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 105842189 is about 10287.9633066997. The cubic root of 105842189 is about 473.0273708176.

The spelling of 105842189 in words is "one hundred five million, eight hundred forty-two thousand, one hundred eighty-nine".