8739439 has 4 divisors (see below), whose sum is σ = 8821224. Its totient is φ = 8657656.

The previous prime is 8739433. The next prime is 8739463. The reversal of 8739439 is 9349378.

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 8739439 - 2³ = 8739431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8739395 and 8739404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8739431) by changing a digit.

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, 40732 + ... + 40945.

It is an arithmetic number, because the mean of its divisors is an integer number (2205306).

Almost surely, 2^8739439 is an apocalyptic number.

8739439 is a deficient number, since it is larger than the sum of its proper divisors (81785).

8739439 is a wasteful number, since it uses less digits than its factorization.

8739439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81784.

The product of its digits is 163296, while the sum is 43.

The square root of 8739439 is about 2956.2542177560. The cubic root of 8739439 is about 205.9813270535.

The spelling of 8739439 in words is "eight million, seven hundred thirty-nine thousand, four hundred thirty-nine".