108139865 has 8 divisors (see below), whose sum is σ = 130790400. Its totient is φ = 85830192.

The previous prime is 108139847. The next prime is 108139877. The reversal of 108139865 is 568931801.

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

It is a cyclic number.

It is not a de Polignac number, because 108139865 - 2¹⁰ = 108138841 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84515 + ... + 85784.

It is an arithmetic number, because the mean of its divisors is an integer number (16348800).

Almost surely, 2^108139865 is an apocalyptic number.

It is an amenable number.

108139865 is a deficient number, since it is larger than the sum of its proper divisors (22650535).

108139865 is a wasteful number, since it uses less digits than its factorization.

108139865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170431.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 108139865 is about 10399.0319260977. The cubic root of 108139865 is about 476.4258026962.

The spelling of 108139865 in words is "one hundred eight million, one hundred thirty-nine thousand, eight hundred sixty-five".