108091993 has 2 divisors, whose sum is σ = 108091994. Its totient is φ = 108091992.

The previous prime is 108091943. The next prime is 108091999. The reversal of 108091993 is 399190801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96983104 + 11108889 = 9848^2 + 3333^2 .

It is a cyclic number.

It is not a de Polignac number, because 108091993 - 2¹⁷ = 107960921 is a prime.

It is not a weakly prime, because it can be changed into another prime (108091999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54045996 + 54045997.

It is an arithmetic number, because the mean of its divisors is an integer number (54045997).

Almost surely, 2^108091993 is an apocalyptic number.

It is an amenable number.

108091993 is a deficient number, since it is larger than the sum of its proper divisors (1).

108091993 is an equidigital number, since it uses as much as digits as its factorization.

108091993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 108091993 is about 10396.7299185850. The cubic root of 108091993 is about 476.3554899817.

The spelling of 108091993 in words is "one hundred eight million, ninety-one thousand, nine hundred ninety-three".