139639103 has 4 divisors (see below), whose sum is σ = 142886568. Its totient is φ = 136391640.

The previous prime is 139639099. The next prime is 139639109. The reversal of 139639103 is 301936931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301936931 = 31 ⋅9739901.

It is a cyclic number.

It is not a de Polignac number, because 139639103 - 2² = 139639099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139639109) 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, 1623668 + ... + 1623753.

It is an arithmetic number, because the mean of its divisors is an integer number (35721642).

Almost surely, 2^139639103 is an apocalyptic number.

139639103 is a deficient number, since it is larger than the sum of its proper divisors (3247465).

139639103 is an equidigital number, since it uses as much as digits as its factorization.

139639103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247464.

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 139639103 is about 11816.8990433193. The cubic root of 139639103 is about 518.8028463509.

The spelling of 139639103 in words is "one hundred thirty-nine million, six hundred thirty-nine thousand, one hundred three".