609943 has 4 divisors (see below), whose sum is σ = 645840. Its totient is φ = 574048.

The previous prime is 609929. The next prime is 609979. The reversal of 609943 is 349906.

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 609943 - 2⁵ = 609911 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 609943.

It is not an unprimeable number, because it can be changed into a prime (609913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17923 + ... + 17956.

It is an arithmetic number, because the mean of its divisors is an integer number (161460).

2⁶⁰⁹⁹⁴³ is an apocalyptic number.

609943 is a deficient number, since it is larger than the sum of its proper divisors (35897).

609943 is a wasteful number, since it uses less digits than its factorization.

609943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35896.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 609943 is about 780.9884762274. The cubic root of 609943 is about 84.8066192027.

The spelling of 609943 in words is "six hundred nine thousand, nine hundred forty-three".