944509 has 4 divisors (see below), whose sum is σ = 994240. Its totient is φ = 894780.

The previous prime is 944497. The next prime is 944519. The reversal of 944509 is 905449.

It is a happy number.

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 944509 - 2¹⁹ = 420221 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 (944519) 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, 24837 + ... + 24874.

It is an arithmetic number, because the mean of its divisors is an integer number (248560).

2⁹⁴⁴⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

944509 is a deficient number, since it is larger than the sum of its proper divisors (49731).

944509 is a wasteful number, since it uses less digits than its factorization.

944509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49730.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 944509 is about 971.8585287993. The cubic root of 944509 is about 98.1149906623.

Subtracting from 944509 its reverse (905449), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 944509 in words is "nine hundred forty-four thousand, five hundred nine".