900489 has 4 divisors (see below), whose sum is σ = 1200656. Its totient is φ = 600324.

The previous prime is 900481. The next prime is 900491. The reversal of 900489 is 984009.

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 not a de Polignac number, because 900489 - 2³ = 900481 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 900489.

It is not an unprimeable number, because it can be changed into a prime (900481) 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, 150079 + ... + 150084.

It is an arithmetic number, because the mean of its divisors is an integer number (300164).

2⁹⁰⁰⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

900489 is a deficient number, since it is larger than the sum of its proper divisors (300167).

900489 is a wasteful number, since it uses less digits than its factorization.

900489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300166.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 900489 is about 948.9409886816. The cubic root of 900489 is about 96.5664213801.

The spelling of 900489 in words is "nine hundred thousand, four hundred eighty-nine".