509011 has 4 divisors (see below), whose sum is σ = 510624. Its totient is φ = 507400.

The previous prime is 508987. The next prime is 509023. The reversal of 509011 is 110905.

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 509011 - 2⁹ = 508499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160 + ... + 1021.

It is an arithmetic number, because the mean of its divisors is an integer number (127656).

2⁵⁰⁹⁰¹¹ is an apocalyptic number.

509011 is a deficient number, since it is larger than the sum of its proper divisors (1613).

509011 is a wasteful number, since it uses less digits than its factorization.

509011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 509011 is about 713.4500683299. The cubic root of 509011 is about 79.8440189884.

Adding to 509011 its reverse (110905), we get a palindrome (619916).

The spelling of 509011 in words is "five hundred nine thousand, eleven".