8397439 has 4 divisors (see below), whose sum is σ = 8891424. Its totient is φ = 7903456.

The previous prime is 8397437. The next prime is 8397457. The reversal of 8397439 is 9347938.

8397439 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8397439 - 2¹ = 8397437 is a prime.

It is a Duffinian number.

8397439 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8397395 and 8397404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8397437) 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, 246967 + ... + 247000.

It is an arithmetic number, because the mean of its divisors is an integer number (2222856).

Almost surely, 2^8397439 is an apocalyptic number.

8397439 is a deficient number, since it is larger than the sum of its proper divisors (493985).

8397439 is a wasteful number, since it uses less digits than its factorization.

8397439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493984.

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

The square root of 8397439 is about 2897.8335010832. The cubic root of 8397439 is about 203.2586106039.

It can be divided in two parts, 8397 and 439, that added together give a square (8836 = 94²).

The spelling of 8397439 in words is "eight million, three hundred ninety-seven thousand, four hundred thirty-nine".