105173509 has 16 divisors (see below), whose sum is σ = 129022848. Its totient is φ = 83676672.

The previous prime is 105173501. The next prime is 105173527. The reversal of 105173509 is 905371501.

It is a cyclic number.

It is not a de Polignac number, because 105173509 - 2³ = 105173501 is a prime.

It is a super-2 number, since 2×105173509² = 22122933990746162, 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 (105173501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2634 + ... + 14740.

It is an arithmetic number, because the mean of its divisors is an integer number (8063928).

Almost surely, 2^105173509 is an apocalyptic number.

It is an amenable number.

105173509 is a deficient number, since it is larger than the sum of its proper divisors (23849339).

105173509 is a wasteful number, since it uses less digits than its factorization.

105173509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12204.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 105173509 is about 10255.4136435348. The cubic root of 105173509 is about 472.0291160939.

The spelling of 105173509 in words is "one hundred five million, one hundred seventy-three thousand, five hundred nine".