108891494321 has 4 divisors (see below), whose sum is σ = 108937307172. Its totient is φ = 108845681472.

The previous prime is 108891494317. The next prime is 108891494347. The reversal of 108891494321 is 123494198801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123494198801 = 3631 ⋅34011071.

It can be written as a sum of positive squares in 2 ways, for example, as 46683652096 + 62207842225 = 216064^2 + 249415^2 .

It is a cyclic number.

It is not a de Polignac number, because 108891494321 - 2² = 108891494317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 108891494321.

It is not an unprimeable number, because it can be changed into a prime (108891494521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22902860 + ... + 22907613.

It is an arithmetic number, because the mean of its divisors is an integer number (27234326793).

Almost surely, 2^108891494321 is an apocalyptic number.

It is an amenable number.

108891494321 is a deficient number, since it is larger than the sum of its proper divisors (45812851).

108891494321 is an equidigital number, since it uses as much as digits as its factorization.

108891494321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45812850.

The product of its (nonzero) digits is 497664, while the sum is 50.

The spelling of 108891494321 in words is "one hundred eight billion, eight hundred ninety-one million, four hundred ninety-four thousand, three hundred twenty-one".