138049 has 4 divisors (see below), whose sum is σ = 139264. Its totient is φ = 136836.

The previous prime is 138041. The next prime is 138053. The reversal of 138049 is 940831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 940831 = 17 ⋅55343.

It is a cyclic number.

It is not a de Polignac number, because 138049 - 2³ = 138041 is a prime.

It is a Duffinian number.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138041) 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 3 ways as a sum of consecutive naturals, for example, 417 + ... + 670.

It is an arithmetic number, because the mean of its divisors is an integer number (34816).

2¹³⁸⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

138049 is a deficient number, since it is larger than the sum of its proper divisors (1215).

138049 is a wasteful number, since it uses less digits than its factorization.

138049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 138049 is about 371.5494583498. The cubic root of 138049 is about 51.6826080997.

The spelling of 138049 in words is "one hundred thirty-eight thousand, forty-nine".