108721790 has 8 divisors (see below), whose sum is σ = 195699240. Its totient is φ = 43488712.

The previous prime is 108721757. The next prime is 108721793. The reversal of 108721790 is 97127801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 108721790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108721793) 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, 5436080 + ... + 5436099.

It is an arithmetic number, because the mean of its divisors is an integer number (24462405).

Almost surely, 2^108721790 is an apocalyptic number.

108721790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

108721790 is a deficient number, since it is larger than the sum of its proper divisors (86977450).

108721790 is a wasteful number, since it uses less digits than its factorization.

108721790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10872186.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 108721790 is about 10426.9741536076. The cubic root of 108721790 is about 477.2788592519.

The spelling of 108721790 in words is "one hundred eight million, seven hundred twenty-one thousand, seven hundred ninety".