108921198 has 16 divisors (see below), whose sum is σ = 221535360. Its totient is φ = 35691576.

The previous prime is 108921181. The next prime is 108921217. The reversal of 108921198 is 891129801.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153490 + ... + 154197.

It is an arithmetic number, because the mean of its divisors is an integer number (13845960).

Almost surely, 2^108921198 is an apocalyptic number.

108921198 is an abundant number, since it is smaller than the sum of its proper divisors (112614162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

108921198 is a wasteful number, since it uses less digits than its factorization.

108921198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307751.

The product of its (nonzero) digits is 10368, while the sum is 39.

The square root of 108921198 is about 10436.5318952227. The cubic root of 108921198 is about 477.5704754215.

It can be divided in two parts, 10892 and 1198, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 108921198 in words is "one hundred eight million, nine hundred twenty-one thousand, one hundred ninety-eight".