899409 has 8 divisors (see below), whose sum is σ = 1370560. Its totient is φ = 513936.

The previous prime is 899401. The next prime is 899413. The reversal of 899409 is 904998.

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

It is not a de Polignac number, because 899409 - 2³ = 899401 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (899401) 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, 21394 + ... + 21435.

It is an arithmetic number, because the mean of its divisors is an integer number (171320).

2⁸⁹⁹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

899409 is a deficient number, since it is larger than the sum of its proper divisors (471151).

899409 is a wasteful number, since it uses less digits than its factorization.

899409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42839.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 899409 is about 948.3717625488. The cubic root of 899409 is about 96.5278003431.

The spelling of 899409 in words is "eight hundred ninety-nine thousand, four hundred nine".