139989718 has 8 divisors (see below), whose sum is σ = 229074120. Its totient is φ = 63631680.

The previous prime is 139989683. The next prime is 139989719. The reversal of 139989718 is 817989931.

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

It is a super-3 number, since 3×139989718³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139989719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3181563 + ... + 3181606.

It is an arithmetic number, because the mean of its divisors is an integer number (28634265).

Almost surely, 2^139989718 is an apocalyptic number.

139989718 is a deficient number, since it is larger than the sum of its proper divisors (89084402).

139989718 is a wasteful number, since it uses less digits than its factorization.

139989718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363182.

The product of its digits is 979776, while the sum is 55.

The square root of 139989718 is about 11831.7250644190. The cubic root of 139989718 is about 519.2366981538.

It can be divided in two parts, 13998 and 9718, that added together give a square (23716 = 154²).

The spelling of 139989718 in words is "one hundred thirty-nine million, nine hundred eighty-nine thousand, seven hundred eighteen".