138544847 has 16 divisors (see below), whose sum is σ = 167941632. Its totient is φ = 111719520.

The previous prime is 138544843. The next prime is 138544867. The reversal of 138544847 is 748445831.

It is a cyclic number.

It is not a de Polignac number, because 138544847 - 2² = 138544843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138544798 and 138544807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138544843) 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 15 ways as a sum of consecutive naturals, for example, 2768 + ... + 16874.

It is an arithmetic number, because the mean of its divisors is an integer number (10496352).

Almost surely, 2^138544847 is an apocalyptic number.

138544847 is a deficient number, since it is larger than the sum of its proper divisors (29396785).

138544847 is a wasteful number, since it uses less digits than its factorization.

138544847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14198.

The product of its digits is 430080, while the sum is 44.

The square root of 138544847 is about 11770.5075081748. The cubic root of 138544847 is about 517.4441235072. Note that the first 3 decimals are identical.

The spelling of 138544847 in words is "one hundred thirty-eight million, five hundred forty-four thousand, eight hundred forty-seven".