869447 has 4 divisors (see below), whose sum is σ = 876216. Its totient is φ = 862680.

The previous prime is 869443. The next prime is 869461. The reversal of 869447 is 744968.

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 869447 - 2² = 869443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 869447.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869447.

It is not an unprimeable number, because it can be changed into a prime (869443) 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, 3188 + ... + 3449.

It is an arithmetic number, because the mean of its divisors is an integer number (219054).

2⁸⁶⁹⁴⁴⁷ is an apocalyptic number.

869447 is a deficient number, since it is larger than the sum of its proper divisors (6769).

869447 is a wasteful number, since it uses less digits than its factorization.

869447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768.

The product of its digits is 48384, while the sum is 38.

The square root of 869447 is about 932.4414190715. The cubic root of 869447 is about 95.4437961372.

The spelling of 869447 in words is "eight hundred sixty-nine thousand, four hundred forty-seven".