108189281 has 4 divisors (see below), whose sum is σ = 109260564. Its totient is φ = 107118000.

The previous prime is 108189239. The next prime is 108189293. The reversal of 108189281 is 182981801.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105987025 + 2202256 = 10295^2 + 1484^2 .

It is a cyclic number.

It is not a de Polignac number, because 108189281 - 2¹⁰ = 108188257 is a prime.

It is a super-2 number, since 2×108189281² = 23409841046593922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (108189481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535490 + ... + 535691.

It is an arithmetic number, because the mean of its divisors is an integer number (27315141).

Almost surely, 2^108189281 is an apocalyptic number.

It is an amenable number.

108189281 is a deficient number, since it is larger than the sum of its proper divisors (1071283).

108189281 is a wasteful number, since it uses less digits than its factorization.

108189281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071282.

The product of its (nonzero) digits is 9216, while the sum is 38.

The square root of 108189281 is about 10401.4076451219. The cubic root of 108189281 is about 476.4983614215.

The spelling of 108189281 in words is "one hundred eight million, one hundred eighty-nine thousand, two hundred eighty-one".