118689639 has 8 divisors (see below), whose sum is σ = 158524800. Its totient is φ = 78990456.

The previous prime is 118689619. The next prime is 118689647. The reversal of 118689639 is 936986811.

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

It is not a de Polignac number, because 118689639 - 2⁷ = 118689511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 118689591 and 118689600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118689619) 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, 31939 + ... + 35460.

It is an arithmetic number, because the mean of its divisors is an integer number (19815600).

Almost surely, 2^118689639 is an apocalyptic number.

118689639 is a deficient number, since it is larger than the sum of its proper divisors (39835161).

118689639 is an equidigital number, since it uses as much as digits as its factorization.

118689639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67989.

The product of its digits is 559872, while the sum is 51.

The square root of 118689639 is about 10894.4774541967. The cubic root of 118689639 is about 491.4404911002.

The spelling of 118689639 in words is "one hundred eighteen million, six hundred eighty-nine thousand, six hundred thirty-nine".