909439 has 4 divisors (see below), whose sum is σ = 922320. Its totient is φ = 896560.

The previous prime is 909437. The next prime is 909451. The reversal of 909439 is 934909.

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

It is a cyclic number.

It is not a de Polignac number, because 909439 - 2¹ = 909437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6334 + ... + 6475.

It is an arithmetic number, because the mean of its divisors is an integer number (230580).

2⁹⁰⁹⁴³⁹ is an apocalyptic number.

909439 is a deficient number, since it is larger than the sum of its proper divisors (12881).

909439 is a wasteful number, since it uses less digits than its factorization.

909439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12880.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 909439 is about 953.6451121880. The cubic root of 909439 is about 96.8852932524.

The spelling of 909439 in words is "nine hundred nine thousand, four hundred thirty-nine".