511989 has 8 divisors (see below), whose sum is σ = 722880. Its totient is φ = 321216.

The previous prime is 511963. The next prime is 511991. The reversal of 511989 is 989115.

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

It is not a de Polignac number, because 511989 - 2⁹ = 511477 is a prime.

It is a super-2 number, since 2×511989² = 524265472242, which contains 22 as substring.

511989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511909) 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, 4969 + ... + 5070.

It is an arithmetic number, because the mean of its divisors is an integer number (90360).

2⁵¹¹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

511989 is a deficient number, since it is larger than the sum of its proper divisors (210891).

511989 is a wasteful number, since it uses less digits than its factorization.

511989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10059.

The product of its digits is 3240, while the sum is 33.

The square root of 511989 is about 715.5340662750. The cubic root of 511989 is about 79.9994270792. Note that the first 3 decimals are identical.

The spelling of 511989 in words is "five hundred eleven thousand, nine hundred eighty-nine".