139207 has 4 divisors (see below), whose sum is σ = 140616. Its totient is φ = 137800.

The previous prime is 139201. The next prime is 139241. The reversal of 139207 is 702931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702931 = 29 ⋅24239.

It is a cyclic number.

It is not a de Polignac number, because 139207 - 2³ = 139199 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 (139201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544 + ... + 757.

It is an arithmetic number, because the mean of its divisors is an integer number (35154).

2¹³⁹²⁰⁷ is an apocalyptic number.

139207 is a deficient number, since it is larger than the sum of its proper divisors (1409).

139207 is a wasteful number, since it uses less digits than its factorization.

139207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 139207 is about 373.1045429903. The cubic root of 139207 is about 51.8267160925.

The spelling of 139207 in words is "one hundred thirty-nine thousand, two hundred seven".