108991339 has 4 divisors (see below), whose sum is σ = 109115656. Its totient is φ = 108867024.

The previous prime is 108991327. The next prime is 108991361. The reversal of 108991339 is 933199801.

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

It is a cyclic number.

It is not a de Polignac number, because 108991339 - 2¹⁷ = 108860267 is a prime.

It is a super-2 number, since 2×108991339² = 23758223954025842, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 108991295 and 108991304.

It is not an unprimeable number, because it can be changed into a prime (108991039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60834 + ... + 62599.

It is an arithmetic number, because the mean of its divisors is an integer number (27278914).

Almost surely, 2^108991339 is an apocalyptic number.

108991339 is a deficient number, since it is larger than the sum of its proper divisors (124317).

108991339 is an equidigital number, since it uses as much as digits as its factorization.

108991339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124316.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 108991339 is about 10439.8917139978. The cubic root of 108991339 is about 477.6729656732.

The spelling of 108991339 in words is "one hundred eight million, nine hundred ninety-one thousand, three hundred thirty-nine".