138922 has 8 divisors (see below), whose sum is σ = 238176. Its totient is φ = 59532.

The previous prime is 138917. The next prime is 138923. The reversal of 138922 is 229831.

138922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (138923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4948 + ... + 4975.

It is an arithmetic number, because the mean of its divisors is an integer number (29772).

2¹³⁸⁹²² is an apocalyptic number.

138922 is a deficient number, since it is larger than the sum of its proper divisors (99254).

138922 is an equidigital number, since it uses as much as digits as its factorization.

138922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9932.

The product of its digits is 864, while the sum is 25.

The square root of 138922 is about 372.7224168198. The cubic root of 138922 is about 51.7913234624.

Subtracting 138922 from its reverse (229831), we obtain a palindrome (90909).

The spelling of 138922 in words is "one hundred thirty-eight thousand, nine hundred twenty-two".