439121139 has 4 divisors (see below), whose sum is σ = 585494856. Its totient is φ = 292747424.

The previous prime is 439121113. The next prime is 439121147. The reversal of 439121139 is 931121934.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 439121139 - 2¹¹ = 439119091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (439121539) 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, 73186854 + ... + 73186859.

It is an arithmetic number, because the mean of its divisors is an integer number (146373714).

Almost surely, 2^439121139 is an apocalyptic number.

439121139 is a deficient number, since it is larger than the sum of its proper divisors (146373717).

439121139 is a wasteful number, since it uses less digits than its factorization.

439121139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146373716.

The product of its digits is 5832, while the sum is 33.

The square root of 439121139 is about 20955.2174648702. The cubic root of 439121139 is about 760.0837505812.

The spelling of 439121139 in words is "four hundred thirty-nine million, one hundred twenty-one thousand, one hundred thirty-nine".