138764543 has 8 divisors (see below), whose sum is σ = 152419200. Its totient is φ = 125745048.

The previous prime is 138764537. The next prime is 138764551. The reversal of 138764543 is 345467831.

138764543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138764543 - 2²⁶ = 71655679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138764543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138764503) 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, 158333 + ... + 159206.

It is an arithmetic number, because the mean of its divisors is an integer number (19052400).

Almost surely, 2^138764543 is an apocalyptic number.

138764543 is a deficient number, since it is larger than the sum of its proper divisors (13654657).

138764543 is a wasteful number, since it uses less digits than its factorization.

138764543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317581.

The product of its digits is 241920, while the sum is 41.

The square root of 138764543 is about 11779.8362891850. The cubic root of 138764543 is about 517.7174895455.

The spelling of 138764543 in words is "one hundred thirty-eight million, seven hundred sixty-four thousand, five hundred forty-three".