139299205 has 8 divisors (see below), whose sum is σ = 167854104. Its totient is φ = 110976000.

The previous prime is 139299197. The next prime is 139299221. The reversal of 139299205 is 502992931.

It can be written as a sum of positive squares in 4 ways, for example, as 77739489 + 61559716 = 8817^2 + 7846^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139299205 - 2³ = 139299197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 56596 + ... + 59005.

It is an arithmetic number, because the mean of its divisors is an integer number (20981763).

Almost surely, 2^139299205 is an apocalyptic number.

It is an amenable number.

139299205 is a deficient number, since it is larger than the sum of its proper divisors (28554899).

139299205 is a wasteful number, since it uses less digits than its factorization.

139299205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115847.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 139299205 is about 11802.5084198233. The cubic root of 139299205 is about 518.3815619653.

The spelling of 139299205 in words is "one hundred thirty-nine million, two hundred ninety-nine thousand, two hundred five".