105642193 has 4 divisors (see below), whose sum is σ = 105717348. Its totient is φ = 105567040.

The previous prime is 105642161. The next prime is 105642209. The reversal of 105642193 is 391246501.

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 57866449 + 47775744 = 7607^2 + 6912^2 .

It is a cyclic number.

It is not a de Polignac number, because 105642193 - 2⁵ = 105642161 is a prime.

It is a super-2 number, since 2×105642193² = 22320545883698498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105642133) 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, 35428 + ... + 38293.

It is an arithmetic number, because the mean of its divisors is an integer number (26429337).

Almost surely, 2^105642193 is an apocalyptic number.

It is an amenable number.

105642193 is a deficient number, since it is larger than the sum of its proper divisors (75155).

105642193 is an equidigital number, since it uses as much as digits as its factorization.

105642193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75154.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 105642193 is about 10278.2388082784. The cubic root of 105642193 is about 472.7292438538.

Adding to 105642193 its reverse (391246501), we get a palindrome (496888694).

The spelling of 105642193 in words is "one hundred five million, six hundred forty-two thousand, one hundred ninety-three".