611009 has 8 divisors (see below), whose sum is σ = 703488. Its totient is φ = 519840.

The previous prime is 610993. The next prime is 611011. The reversal of 611009 is 900116.

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

It is a cyclic number.

It is not a de Polignac number, because 611009 - 2⁴ = 610993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (611069) 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, 1109 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (87936).

2⁶¹¹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

611009 is a deficient number, since it is larger than the sum of its proper divisors (92479).

611009 is a wasteful number, since it uses less digits than its factorization.

611009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 611009 is about 781.6706467560. The cubic root of 611009 is about 84.8559960793.

The spelling of 611009 in words is "six hundred eleven thousand, nine".