139008229 has 4 divisors (see below), whose sum is σ = 139036300. Its totient is φ = 138980160.

The previous prime is 139008227. The next prime is 139008253. The reversal of 139008229 is 922800931.

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 44957025 + 94051204 = 6705^2 + 9698^2 .

It is a cyclic number.

It is not a de Polignac number, because 139008229 - 2¹ = 139008227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139008194 and 139008203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139008227) 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, 4404 + ... + 17245.

It is an arithmetic number, because the mean of its divisors is an integer number (34759075).

Almost surely, 2^139008229 is an apocalyptic number.

It is an amenable number.

139008229 is a deficient number, since it is larger than the sum of its proper divisors (28071).

139008229 is an equidigital number, since it uses as much as digits as its factorization.

139008229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28070.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 139008229 is about 11790.1751047217. The cubic root of 139008229 is about 518.0203688517.

The spelling of 139008229 in words is "one hundred thirty-nine million, eight thousand, two hundred twenty-nine".