139707 has 18 divisors (see below), whose sum is σ = 217932. Its totient is φ = 86184.

The previous prime is 139703. The next prime is 139709. The reversal of 139707 is 707931.

139707 is nontrivially palindromic in base 7.

139707 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139707 - 2² = 139703 is a prime.

139707 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139707.

It is not an unprimeable number, because it can be changed into a prime (139703) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3228 + ... + 3270.

2¹³⁹⁷⁰⁷ is an apocalyptic number.

139707 is a deficient number, since it is larger than the sum of its proper divisors (78225).

139707 is a wasteful number, since it uses less digits than its factorization.

139707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 1323, while the sum is 27.

The square root of 139707 is about 373.7739958852. The cubic root of 139707 is about 51.8886918908. Note that the first 3 decimals are identical.

Subtracting from 139707 its product of nonzero digits (1323), we obtain a square (138384 = 372²).

The spelling of 139707 in words is "one hundred thirty-nine thousand, seven hundred seven".