138201205 has 4 divisors (see below), whose sum is σ = 165841452. Its totient is φ = 110560960.

The previous prime is 138201199. The next prime is 138201221. The reversal of 138201205 is 502102831.

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 62615569 + 75585636 = 7913^2 + 8694^2 .

It is not a de Polignac number, because 138201205 - 2⁹ = 138200693 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13820116 + ... + 13820125.

It is an arithmetic number, because the mean of its divisors is an integer number (41460363).

Almost surely, 2^138201205 is an apocalyptic number.

It is an amenable number.

138201205 is a deficient number, since it is larger than the sum of its proper divisors (27640247).

138201205 is an equidigital number, since it uses as much as digits as its factorization.

138201205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27640246.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 138201205 is about 11755.9008587177. The cubic root of 138201205 is about 517.0159522780.

The spelling of 138201205 in words is "one hundred thirty-eight million, two hundred one thousand, two hundred five".