869729 has 4 divisors (see below), whose sum is σ = 993984. Its totient is φ = 745476.

The previous prime is 869717. The next prime is 869747. The reversal of 869729 is 927968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869729 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869729.

It is not an unprimeable number, because it can be changed into a prime (869779) 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, 62117 + ... + 62130.

It is an arithmetic number, because the mean of its divisors is an integer number (248496).

2⁸⁶⁹⁷²⁹ is an apocalyptic number.

It is an amenable number.

869729 is a deficient number, since it is larger than the sum of its proper divisors (124255).

869729 is a wasteful number, since it uses less digits than its factorization.

869729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124254.

The product of its digits is 54432, while the sum is 41.

The square root of 869729 is about 932.5926227459. The cubic root of 869729 is about 95.4541138990.

The spelling of 869729 in words is "eight hundred sixty-nine thousand, seven hundred twenty-nine".