108939309 has 8 divisors (see below), whose sum is σ = 145448832. Its totient is φ = 72528000.

The previous prime is 108939263. The next prime is 108939323. The reversal of 108939309 is 903939801.

It is a happy number.

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

It is not a de Polignac number, because 108939309 - 2¹⁷ = 108808237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108939329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21924 + ... + 26429.

It is an arithmetic number, because the mean of its divisors is an integer number (18181104).

Almost surely, 2^108939309 is an apocalyptic number.

It is an amenable number.

108939309 is a deficient number, since it is larger than the sum of its proper divisors (36509523).

108939309 is an equidigital number, since it uses as much as digits as its factorization.

108939309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49107.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 108939309 is about 10437.3995324506. The cubic root of 108939309 is about 477.5969434850.

It can be divided in two parts, 10893 and 9309, that added together give a palindrome (20202).

The spelling of 108939309 in words is "one hundred eight million, nine hundred thirty-nine thousand, three hundred nine".