30009 has 8 divisors (see below), whose sum is σ = 45760. Its totient is φ = 17136.

The previous prime is 29989. The next prime is 30011. The reversal of 30009 is 90003.

30009 = 32² + 33² + ... + 49².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30009 - 2⁷ = 29881 is a prime.

It is an Ulam number.

It is a Duffinian number.

30009 is a modest number, since divided by 9 gives 3 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 29976 and 30003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694 + ... + 735.

It is an arithmetic number, because the mean of its divisors is an integer number (5720).

2³⁰⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

30009 is a deficient number, since it is larger than the sum of its proper divisors (15751).

30009 is a wasteful number, since it uses less digits than its factorization.

30009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439.

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 30009 is about 173.2310595707. The cubic root of 30009 is about 31.0754319814.

It can be divided in two parts, 3000 and 9, that multiplied together give a cube (27000 = 30³).

The spelling of 30009 in words is "thirty thousand, nine".