108384921 has 6 divisors (see below), whose sum is σ = 156556010. Its totient is φ = 72256608.

The previous prime is 108384917. The next prime is 108384937. The reversal of 108384921 is 129483801.

It can be written as a sum of positive squares in only one way, i.e., 56025225 + 52359696 = 7485^2 + 7236^2 .

It is not a de Polignac number, because 108384921 - 2² = 108384917 is a prime.

It is a super-2 number, since 2×108384921² = 23494582200352482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108384821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6021376 + ... + 6021393.

Almost surely, 2^108384921 is an apocalyptic number.

It is an amenable number.

108384921 is a deficient number, since it is larger than the sum of its proper divisors (48171089).

108384921 is a wasteful number, since it uses less digits than its factorization.

108384921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12042775 (or 12042772 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 108384921 is about 10410.8078937228. The cubic root of 108384921 is about 476.7854077393.

The spelling of 108384921 in words is "one hundred eight million, three hundred eighty-four thousand, nine hundred twenty-one".