909489 has 24 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 495264.

The previous prime is 909481. The next prime is 909521. The reversal of 909489 is 984909.

909489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 909489 - 2³ = 909481 is a prime.

It is a super-2 number, since 2×909489² = 1654340482242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

909489 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3247 + ... + 3515.

It is an arithmetic number, because the mean of its divisors is an integer number (61560).

2⁹⁰⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

909489 is a deficient number, since it is larger than the sum of its proper divisors (567951).

909489 is a wasteful number, since it uses less digits than its factorization.

909489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 302 counting only the distinct ones).

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

The square root of 909489 is about 953.6713270304. The cubic root of 909489 is about 96.8870687704.

The spelling of 909489 in words is "nine hundred nine thousand, four hundred eighty-nine".