869439 has 8 divisors (see below), whose sum is σ = 1163952. Its totient is φ = 577280.

The previous prime is 869437. The next prime is 869443. The reversal of 869439 is 934968.

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

It is a cyclic number.

It is not a de Polignac number, because 869439 - 2¹ = 869437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 869397 and 869406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649 + ... + 1469.

It is an arithmetic number, because the mean of its divisors is an integer number (145494).

2⁸⁶⁹⁴³⁹ is an apocalyptic number.

869439 is a deficient number, since it is larger than the sum of its proper divisors (294513).

869439 is a wasteful number, since it uses less digits than its factorization.

869439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177.

The product of its digits is 46656, while the sum is 39.

The square root of 869439 is about 932.4371292479. The cubic root of 869439 is about 95.4435034022.

The spelling of 869439 in words is "eight hundred sixty-nine thousand, four hundred thirty-nine".