501000009 has 16 divisors (see below), whose sum is σ = 686180352. Its totient is φ = 324970128.

The previous prime is 500999987. The next prime is 501000023. The reversal of 501000009 is 900000105.

It is not a de Polignac number, because 501000009 - 2⁵ = 500999977 is a prime.

It is a super-3 number, since 3×501000009³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (501000029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26544 + ... + 41310.

It is an arithmetic number, because the mean of its divisors is an integer number (42886272).

Almost surely, 2^501000009 is an apocalyptic number.

It is an amenable number.

501000009 is a deficient number, since it is larger than the sum of its proper divisors (185180343).

501000009 is a wasteful number, since it uses less digits than its factorization.

501000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15076.

The product of its (nonzero) digits is 45, while the sum is 15.

The square root of 501000009 is about 22383.0294866446. The cubic root of 501000009 is about 794.2293120596.

The spelling of 501000009 in words is "five hundred one million, nine", and thus it is an aban number.