138039922 has 4 divisors (see below), whose sum is σ = 207059886. Its totient is φ = 69019960.

The previous prime is 138039919. The next prime is 138039929. The reversal of 138039922 is 229930831.

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., 132227001 + 5812921 = 11499^2 + 2411^2 .

It is not an unprimeable number, because it can be changed into a prime (138039929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34509979 + ... + 34509982.

Almost surely, 2^138039922 is an apocalyptic number.

138039922 is a deficient number, since it is larger than the sum of its proper divisors (69019964).

138039922 is an equidigital number, since it uses as much as digits as its factorization.

138039922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69019963.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 138039922 is about 11749.0391947597. The cubic root of 138039922 is about 516.8147520487.

The spelling of 138039922 in words is "one hundred thirty-eight million, thirty-nine thousand, nine hundred twenty-two".