105808193 has 4 divisors (see below), whose sum is σ = 107804628. Its totient is φ = 103811760.

The previous prime is 105808189. The next prime is 105808201. The reversal of 105808193 is 391808501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 391808501 = 7 ⋅55972643.

It can be written as a sum of positive squares in 2 ways, for example, as 93857344 + 11950849 = 9688^2 + 3457^2 .

It is a cyclic number.

It is not a de Polignac number, because 105808193 - 2² = 105808189 is a prime.

It is a super-2 number, since 2×105808193² = 22390747411850498, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105808103) 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, 998138 + ... + 998243.

It is an arithmetic number, because the mean of its divisors is an integer number (26951157).

Almost surely, 2^105808193 is an apocalyptic number.

It is an amenable number.

105808193 is a deficient number, since it is larger than the sum of its proper divisors (1996435).

105808193 is an equidigital number, since it uses as much as digits as its factorization.

105808193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996434.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 105808193 is about 10286.3109519400. The cubic root of 105808193 is about 472.9767206919.

The spelling of 105808193 in words is "one hundred five million, eight hundred eight thousand, one hundred ninety-three".