138986753 has 8 divisors (see below), whose sum is σ = 140217000. Its totient is φ = 137760768.

The previous prime is 138986719. The next prime is 138986773. The reversal of 138986753 is 357689831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4032064 + 134954689 = 2008^2 + 11617^2 .

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 138986753 - 2¹⁰ = 138985729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138986773) 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, 113975 + ... + 115187.

It is an arithmetic number, because the mean of its divisors is an integer number (17527125).

Almost surely, 2^138986753 is an apocalyptic number.

It is an amenable number.

138986753 is a deficient number, since it is larger than the sum of its proper divisors (1230247).

138986753 is a wasteful number, since it uses less digits than its factorization.

138986753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131.

The product of its digits is 1088640, while the sum is 50.

The square root of 138986753 is about 11789.2643112282. The cubic root of 138986753 is about 517.9936903869.

The spelling of 138986753 in words is "one hundred thirty-eight million, nine hundred eighty-six thousand, seven hundred fifty-three".