899729 has 4 divisors (see below), whose sum is σ = 924084. Its totient is φ = 875376.

The previous prime is 899719. The next prime is 899749. The reversal of 899729 is 927998.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 719104 + 180625 = 848^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 899729 - 2⁸ = 899473 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 899729.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 899729.

It is not an unprimeable number, because it can be changed into a prime (899719) 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 3 ways as a sum of consecutive naturals, for example, 12122 + ... + 12195.

It is an arithmetic number, because the mean of its divisors is an integer number (231021).

2⁸⁹⁹⁷²⁹ is an apocalyptic number.

It is an amenable number.

899729 is a deficient number, since it is larger than the sum of its proper divisors (24355).

899729 is a wasteful number, since it uses less digits than its factorization.

899729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24354.

The product of its digits is 81648, while the sum is 44.

The square root of 899729 is about 948.5404577560. The cubic root of 899729 is about 96.5392468350.

The spelling of 899729 in words is "eight hundred ninety-nine thousand, seven hundred twenty-nine".