609849 has 10 divisors (see below), whose sum is σ = 911130. Its totient is φ = 406512.

The previous prime is 609821. The next prime is 609859. The reversal of 609849 is 948906.

609849 is a `hidden beast` number, since 609 + 8 + 49 = 666.

609849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 480249 + 129600 = 693^2 + 360^2 .

It is not a de Polignac number, because 609849 - 2⁸ = 609593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (609809) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3684 + ... + 3845.

It is an arithmetic number, because the mean of its divisors is an integer number (91113).

2⁶⁰⁹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

609849 is a deficient number, since it is larger than the sum of its proper divisors (301281).

609849 is an equidigital number, since it uses as much as digits as its factorization.

609849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7541 (or 7532 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 609849 is about 780.9282937633. The cubic root of 609849 is about 84.8022623848.

The spelling of 609849 in words is "six hundred nine thousand, eight hundred forty-nine".