138032873 has 4 divisors (see below), whose sum is σ = 150581328. Its totient is φ = 125484420.

The previous prime is 138032861. The next prime is 138032879. The reversal of 138032873 is 378230831.

138032873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 378230831 = 11 ⋅34384621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138032873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138032879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6274211 + ... + 6274232.

It is an arithmetic number, because the mean of its divisors is an integer number (37645332).

Almost surely, 2^138032873 is an apocalyptic number.

It is an amenable number.

138032873 is a deficient number, since it is larger than the sum of its proper divisors (12548455).

138032873 is a wasteful number, since it uses less digits than its factorization.

138032873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12548454.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 138032873 is about 11748.7392089534. The cubic root of 138032873 is about 516.8059548612.

The spelling of 138032873 in words is "one hundred thirty-eight million, thirty-two thousand, eight hundred seventy-three".