139139 has 16 divisors (see below), whose sum is σ = 188160. Its totient is φ = 99360.

The previous prime is 139133. The next prime is 139169. The reversal of 139139 is 931931.

139139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 139139 - 2⁴ = 139123 is a prime.

It is a super-2 number, since 2×139139² = 38719322642, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (139133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 932 + ... + 1070.

It is an arithmetic number, because the mean of its divisors is an integer number (11760).

2¹³⁹¹³⁹ is an apocalyptic number.

139139 is a deficient number, since it is larger than the sum of its proper divisors (49021).

139139 is a wasteful number, since it uses less digits than its factorization.

139139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170.

The product of its digits is 729, while the sum is 26.

The square root of 139139 is about 373.0134045849. The cubic root of 139139 is about 51.8182759262.

The spelling of 139139 in words is "one hundred thirty-nine thousand, one hundred thirty-nine".