139929 has 4 divisors (see below), whose sum is σ = 186576. Its totient is φ = 93284.

The previous prime is 139921. The next prime is 139939. The reversal of 139929 is 929931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 929931 = 3 ⋅309977.

It is a cyclic number.

It is not a de Polignac number, because 139929 - 2³ = 139921 is a prime.

It is a D-number.

139929 is a lucky number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 139929.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139929.

It is not an unprimeable number, because it can be changed into a prime (139921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23319 + ... + 23324.

It is an arithmetic number, because the mean of its divisors is an integer number (46644).

2¹³⁹⁹²⁹ is an apocalyptic number.

It is an amenable number.

139929 is a deficient number, since it is larger than the sum of its proper divisors (46647).

139929 is an equidigital number, since it uses as much as digits as its factorization.

139929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46646.

The product of its digits is 4374, while the sum is 33.

The square root of 139929 is about 374.0708489043. The cubic root of 139929 is about 51.9161617466.

The spelling of 139929 in words is "one hundred thirty-nine thousand, nine hundred twenty-nine".