108328921 has 8 divisors (see below), whose sum is σ = 110020680. Its totient is φ = 106649088.

The previous prime is 108328903. The next prime is 108328951. The reversal of 108328921 is 129823801.

It can be written as a sum of positive squares in 4 ways, for example, as 29811600 + 78517321 = 5460^2 + 8861^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108328921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108328951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16275 + ... + 21943.

It is an arithmetic number, because the mean of its divisors is an integer number (13752585).

Almost surely, 2^108328921 is an apocalyptic number.

It is an amenable number.

108328921 is a deficient number, since it is larger than the sum of its proper divisors (1691759).

108328921 is an equidigital number, since it uses as much as digits as its factorization.

108328921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5963.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 108328921 is about 10408.1180335352. The cubic root of 108328921 is about 476.7032789022.

The spelling of 108328921 in words is "one hundred eight million, three hundred twenty-eight thousand, nine hundred twenty-one".