105123173 has 4 divisors (see below), whose sum is σ = 108748140. Its totient is φ = 101498208.

The previous prime is 105123169. The next prime is 105123199. The reversal of 105123173 is 371321501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25877569 + 79245604 = 5087^2 + 8902^2 .

It is a cyclic number.

It is not a de Polignac number, because 105123173 - 2² = 105123169 is a prime.

It is a super-2 number, since 2×105123173² = 22101763003175858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105123163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1812440 + ... + 1812497.

It is an arithmetic number, because the mean of its divisors is an integer number (27187035).

Almost surely, 2^105123173 is an apocalyptic number.

It is an amenable number.

105123173 is a deficient number, since it is larger than the sum of its proper divisors (3624967).

105123173 is an equidigital number, since it uses as much as digits as its factorization.

105123173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624966.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 105123173 is about 10252.9592313634. The cubic root of 105123173 is about 471.9537997608.

Adding to 105123173 its reverse (371321501), we get a palindrome (476444674).

The spelling of 105123173 in words is "one hundred five million, one hundred twenty-three thousand, one hundred seventy-three".