138604543 has 16 divisors (see below), whose sum is σ = 178767360. Its totient is φ = 104277600.

The previous prime is 138604541. The next prime is 138604549. The reversal of 138604543 is 345406831.

It is a happy number.

It is not a de Polignac number, because 138604543 - 2¹ = 138604541 is a prime.

It is a super-2 number, since 2×138604543² = 38422438680477698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138604499 and 138604508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138604541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28803 + ... + 33268.

It is an arithmetic number, because the mean of its divisors is an integer number (11172960).

Almost surely, 2^138604543 is an apocalyptic number.

138604543 is a deficient number, since it is larger than the sum of its proper divisors (40162817).

138604543 is a wasteful number, since it uses less digits than its factorization.

138604543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62118.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 138604543 is about 11773.0430645607. The cubic root of 138604543 is about 517.5184313567.

The spelling of 138604543 in words is "one hundred thirty-eight million, six hundred four thousand, five hundred forty-three".