139105829 has 4 divisors (see below), whose sum is σ = 142865484. Its totient is φ = 135346176.

The previous prime is 139105801. The next prime is 139105831. The reversal of 139105829 is 928501931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77404804 + 61701025 = 8798^2 + 7855^2 .

It is a cyclic number.

It is not a de Polignac number, because 139105829 - 2²⁰ = 138057253 is a prime.

It is a super-4 number, since 4×139105829⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139105792 and 139105801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139105229) 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, 1879772 + ... + 1879845.

It is an arithmetic number, because the mean of its divisors is an integer number (35716371).

Almost surely, 2^139105829 is an apocalyptic number.

It is an amenable number.

139105829 is a deficient number, since it is larger than the sum of its proper divisors (3759655).

139105829 is an equidigital number, since it uses as much as digits as its factorization.

139105829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759654.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 139105829 is about 11794.3134179146. The cubic root of 139105829 is about 518.1415774071.

The spelling of 139105829 in words is "one hundred thirty-nine million, one hundred five thousand, eight hundred twenty-nine".