138996543 has 32 divisors (see below), whose sum is σ = 215654400. Its totient is φ = 77998176.

The previous prime is 138996541. The next prime is 138996553. The reversal of 138996543 is 345699831.

It is not a de Polignac number, because 138996543 - 2¹ = 138996541 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 138996492 and 138996501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138996541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 386998 + ... + 387356.

It is an arithmetic number, because the mean of its divisors is an integer number (6739200).

Almost surely, 2^138996543 is an apocalyptic number.

138996543 is a deficient number, since it is larger than the sum of its proper divisors (76657857).

138996543 is a wasteful number, since it uses less digits than its factorization.

138996543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651.

The product of its digits is 699840, while the sum is 48.

The square root of 138996543 is about 11789.6795121835. The cubic root of 138996543 is about 518.0058523114.

The spelling of 138996543 in words is "one hundred thirty-eight million, nine hundred ninety-six thousand, five hundred forty-three".