138139003 has 4 divisors (see below), whose sum is σ = 138321288. Its totient is φ = 137956720.

The previous prime is 138138971. The next prime is 138139009. The reversal of 138139003 is 300931831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300931831 = 239 ⋅1259129.

It is a cyclic number.

It is not a de Polignac number, because 138139003 - 2⁵ = 138138971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138139009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90001 + ... + 91522.

It is an arithmetic number, because the mean of its divisors is an integer number (34580322).

Almost surely, 2^138139003 is an apocalyptic number.

138139003 is a deficient number, since it is larger than the sum of its proper divisors (182285).

138139003 is an equidigital number, since it uses as much as digits as its factorization.

138139003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182284.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 138139003 is about 11753.2549959575. The cubic root of 138139003 is about 516.9383739571.

The spelling of 138139003 in words is "one hundred thirty-eight million, one hundred thirty-nine thousand, three".