138534143 has 8 divisors (see below), whose sum is σ = 151897680. Its totient is φ = 125298880.

The previous prime is 138534119. The next prime is 138534161. The reversal of 138534143 is 341435831.

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

It is a cyclic number.

It is not a de Polignac number, because 138534143 - 2⁶ = 138534079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138534043) 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, 29798 + ... + 34131.

It is an arithmetic number, because the mean of its divisors is an integer number (18987210).

Almost surely, 2^138534143 is an apocalyptic number.

138534143 is a deficient number, since it is larger than the sum of its proper divisors (13363537).

138534143 is a wasteful number, since it uses less digits than its factorization.

138534143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64137.

The product of its digits is 17280, while the sum is 32.

The square root of 138534143 is about 11770.0528036199. The cubic root of 138534143 is about 517.4307972217.

Adding to 138534143 its reverse (341435831), we get a palindrome (479969974).

The spelling of 138534143 in words is "one hundred thirty-eight million, five hundred thirty-four thousand, one hundred forty-three".