138539162 has 4 divisors (see below), whose sum is σ = 207808746. Its totient is φ = 69269580.

The previous prime is 138539161. The next prime is 138539179. The reversal of 138539162 is 261935831.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 121638841 + 16900321 = 11029^2 + 4111^2 .

It is not an unprimeable number, because it can be changed into a prime (138539161) 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 as a sum of consecutive naturals, namely, 34634789 + ... + 34634792.

Almost surely, 2^138539162 is an apocalyptic number.

138539162 is a deficient number, since it is larger than the sum of its proper divisors (69269584).

138539162 is an equidigital number, since it uses as much as digits as its factorization.

138539162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69269583.

The product of its digits is 38880, while the sum is 38.

The square root of 138539162 is about 11770.2660122871. The cubic root of 138539162 is about 517.4370458710.

The spelling of 138539162 in words is "one hundred thirty-eight million, five hundred thirty-nine thousand, one hundred sixty-two".