105820123 has 2 divisors, whose sum is σ = 105820124. Its totient is φ = 105820122.

The previous prime is 105820109. The next prime is 105820129. The reversal of 105820123 is 321028501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105820123 is a prime.

It is a super-2 number, since 2×105820123² = 22395796863470258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105820094 and 105820103.

It is not a weakly prime, because it can be changed into another prime (105820129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52910061 + 52910062.

It is an arithmetic number, because the mean of its divisors is an integer number (52910062).

Almost surely, 2^105820123 is an apocalyptic number.

105820123 is a deficient number, since it is larger than the sum of its proper divisors (1).

105820123 is an equidigital number, since it uses as much as digits as its factorization.

105820123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 105820123 is about 10286.8908325111. The cubic root of 105820123 is about 472.9944962537.

Adding to 105820123 its reverse (321028501), we get a palindrome (426848624).

The spelling of 105820123 in words is "one hundred five million, eight hundred twenty thousand, one hundred twenty-three".