108305993 has 4 divisors (see below), whose sum is σ = 111233220. Its totient is φ = 105378768.

The previous prime is 108305983. The next prime is 108306007. The reversal of 108305993 is 399503801.

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 101767744 + 6538249 = 10088^2 + 2557^2 .

It is a cyclic number.

It is not a de Polignac number, because 108305993 - 2¹⁸ = 108043849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108305983) 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, 1463558 + ... + 1463631.

It is an arithmetic number, because the mean of its divisors is an integer number (27808305).

Almost surely, 2^108305993 is an apocalyptic number.

It is an amenable number.

108305993 is a deficient number, since it is larger than the sum of its proper divisors (2927227).

108305993 is an equidigital number, since it uses as much as digits as its factorization.

108305993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927226.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 108305993 is about 10407.0165273242. The cubic root of 108305993 is about 476.6696448431.

The spelling of 108305993 in words is "one hundred eight million, three hundred five thousand, nine hundred ninety-three".