138543149 has 8 divisors (see below), whose sum is σ = 146821248. Its totient is φ = 130279360.

The previous prime is 138543131. The next prime is 138543161. The reversal of 138543149 is 941345831.

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 138543149 - 2¹⁶ = 138477613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138543199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21404 + ... + 27114.

It is an arithmetic number, because the mean of its divisors is an integer number (18352656).

Almost surely, 2^138543149 is an apocalyptic number.

It is an amenable number.

138543149 is a deficient number, since it is larger than the sum of its proper divisors (8278099).

138543149 is a wasteful number, since it uses less digits than its factorization.

138543149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7155.

The product of its digits is 51840, while the sum is 38.

The square root of 138543149 is about 11770.4353785236. The cubic root of 138543149 is about 517.4420095738.

The spelling of 138543149 in words is "one hundred thirty-eight million, five hundred forty-three thousand, one hundred forty-nine".