138569543 has 8 divisors (see below), whose sum is σ = 158460288. Its totient is φ = 118702584.

The previous prime is 138569513. The next prime is 138569591. The reversal of 138569543 is 345965831.

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

It is not a de Polignac number, because 138569543 - 2²⁰ = 137520967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138569494 and 138569503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138569513) 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, 9080 + ... + 18962.

It is an arithmetic number, because the mean of its divisors is an integer number (19807536).

Almost surely, 2^138569543 is an apocalyptic number.

138569543 is a deficient number, since it is larger than the sum of its proper divisors (19890745).

138569543 is an equidigital number, since it uses as much as digits as its factorization.

138569543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11893.

The product of its digits is 388800, while the sum is 44.

The square root of 138569543 is about 11771.5565240965. The cubic root of 138569543 is about 517.4748669599.

The spelling of 138569543 in words is "one hundred thirty-eight million, five hundred sixty-nine thousand, five hundred forty-three".