108921793 has 4 divisors (see below), whose sum is σ = 108977968. Its totient is φ = 108865620.

The previous prime is 108921781. The next prime is 108921811. The reversal of 108921793 is 397129801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 397129801 = 457 ⋅868993.

It is a cyclic number.

It is not a de Polignac number, because 108921793 - 2¹³ = 108913601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108921763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25071 + ... + 29092.

It is an arithmetic number, because the mean of its divisors is an integer number (27244492).

Almost surely, 2^108921793 is an apocalyptic number.

It is an amenable number.

108921793 is a deficient number, since it is larger than the sum of its proper divisors (56175).

108921793 is an equidigital number, since it uses as much as digits as its factorization.

108921793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56174.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 108921793 is about 10436.5604008217. The cubic root of 108921793 is about 477.5713450224.

The spelling of 108921793 in words is "one hundred eight million, nine hundred twenty-one thousand, seven hundred ninety-three".