6181609 has 4 divisors (see below), whose sum is σ = 7064704. Its totient is φ = 5298516.

The previous prime is 6181601. The next prime is 6181613. The reversal of 6181609 is 9061816.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6181609 - 2³ = 6181601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6181601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441537 + ... + 441550.

It is an arithmetic number, because the mean of its divisors is an integer number (1766176).

Almost surely, 2^6181609 is an apocalyptic number.

It is an amenable number.

6181609 is a deficient number, since it is larger than the sum of its proper divisors (883095).

6181609 is an equidigital number, since it uses as much as digits as its factorization.

6181609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883094.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 6181609 is about 2486.2841752302. The cubic root of 6181609 is about 183.5272303038.

The spelling of 6181609 in words is "six million, one hundred eighty-one thousand, six hundred nine".