108509021 has 8 divisors (see below), whose sum is σ = 113059584. Its totient is φ = 104024160.

The previous prime is 108508997. The next prime is 108509033. The reversal of 108509021 is 120905801.

It is a happy number.

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-108509021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108505021) 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 7 ways as a sum of consecutive naturals, for example, 13040 + ... + 19673.

It is an arithmetic number, because the mean of its divisors is an integer number (14132448).

Almost surely, 2^108509021 is an apocalyptic number.

It is an amenable number.

108509021 is a deficient number, since it is larger than the sum of its proper divisors (4550563).

108509021 is a wasteful number, since it uses less digits than its factorization.

108509021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32851.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 108509021 is about 10416.7663408565. The cubic root of 108509021 is about 476.9673103514.

The spelling of 108509021 in words is "one hundred eight million, five hundred nine thousand, twenty-one".