898809 has 4 divisors (see below), whose sum is σ = 1198416. Its totient is φ = 599204.

The previous prime is 898787. The next prime is 898813. The reversal of 898809 is 908898.

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 not a de Polignac number, because 898809 - 2⁸ = 898553 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 898809.

It is not an unprimeable number, because it can be changed into a prime (898819) 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, 149799 + ... + 149804.

It is an arithmetic number, because the mean of its divisors is an integer number (299604).

2⁸⁹⁸⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

898809 is a deficient number, since it is larger than the sum of its proper divisors (299607).

898809 is a wasteful number, since it uses less digits than its factorization.

898809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299606.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 898809 is about 948.0553781294. The cubic root of 898809 is about 96.5063308508.

The spelling of 898809 in words is "eight hundred ninety-eight thousand, eight hundred nine".