239988109 has 8 divisors (see below), whose sum is σ = 243597312. Its totient is φ = 236396160.

The previous prime is 239988083. The next prime is 239988113. The reversal of 239988109 is 901889932.

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 239988109 - 2⁷ = 239987981 is a prime.

It is a super-2 number, since 2×239988109² = 115188584922791762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239988139) 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 7 ways as a sum of consecutive naturals, for example, 25204 + ... + 33394.

It is an arithmetic number, because the mean of its divisors is an integer number (30449664).

Almost surely, 2^239988109 is an apocalyptic number.

It is an amenable number.

239988109 is a deficient number, since it is larger than the sum of its proper divisors (3609203).

239988109 is an equidigital number, since it uses as much as digits as its factorization.

239988109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8627.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 239988109 is about 15491.5495997011. The cubic root of 239988109 is about 621.4362376597.

The spelling of 239988109 in words is "two hundred thirty-nine million, nine hundred eighty-eight thousand, one hundred nine".