108368921 has 8 divisors (see below), whose sum is σ = 109916520. Its totient is φ = 106831872.

The previous prime is 108368917. The next prime is 108368929. The reversal of 108368921 is 129863801.

It can be written as a sum of positive squares in 4 ways, for example, as 5569600 + 102799321 = 2360^2 + 10139^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 108368921 - 2² = 108368917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108368929) 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 7 ways as a sum of consecutive naturals, for example, 19325 + ... + 24293.

It is an arithmetic number, because the mean of its divisors is an integer number (13739565).

Almost surely, 2^108368921 is an apocalyptic number.

It is an amenable number.

108368921 is a deficient number, since it is larger than the sum of its proper divisors (1547599).

108368921 is a wasteful number, since it uses less digits than its factorization.

108368921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 108368921 is about 10410.0394331626. The cubic root of 108368921 is about 476.7619452445.

The spelling of 108368921 in words is "one hundred eight million, three hundred sixty-eight thousand, nine hundred twenty-one".