139003 has 4 divisors (see below), whose sum is σ = 139840. Its totient is φ = 138168.

The previous prime is 138977. The next prime is 139021. The reversal of 139003 is 300931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 139003 - 2¹³ = 130811 is a prime.

It is a Duffinian number.

139003 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (139033) 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, 75 + ... + 532.

It is an arithmetic number, because the mean of its divisors is an integer number (34960).

2¹³⁹⁰⁰³ is an apocalyptic number.

139003 is a deficient number, since it is larger than the sum of its proper divisors (837).

139003 is an equidigital number, since it uses as much as digits as its factorization.

139003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 139003 is about 372.8310609378. The cubic root of 139003 is about 51.8013873403.

Adding to 139003 its reverse (300931), we get a palindrome (439934).

The spelling of 139003 in words is "one hundred thirty-nine thousand, three".