138003427 has 4 divisors (see below), whose sum is σ = 144003600. Its totient is φ = 132003256.

The previous prime is 138003401. The next prime is 138003457. The reversal of 138003427 is 724300831.

138003427 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.

It is not a de Polignac number, because 138003427 - 2¹⁵ = 137970659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138003395 and 138003404.

It is not an unprimeable number, because it can be changed into a prime (138003457) 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, 3000052 + ... + 3000097.

It is an arithmetic number, because the mean of its divisors is an integer number (36000900).

Almost surely, 2^138003427 is an apocalyptic number.

138003427 is a deficient number, since it is larger than the sum of its proper divisors (6000173).

138003427 is an equidigital number, since it uses as much as digits as its factorization.

138003427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000172.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 138003427 is about 11747.4859863717. The cubic root of 138003427 is about 516.7692028662.

The spelling of 138003427 in words is "one hundred thirty-eight million, three thousand, four hundred twenty-seven".