6128209 has 4 divisors (see below), whose sum is σ = 6134580. Its totient is φ = 6121840.

The previous prime is 6128207. The next prime is 6128237. The reversal of 6128209 is 9028216.

It is a happy number.

6128209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5267025 + 861184 = 2295^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 6128209 - 2¹ = 6128207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6128201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1414 + ... + 3775.

It is an arithmetic number, because the mean of its divisors is an integer number (1533645).

Almost surely, 2^6128209 is an apocalyptic number.

It is an amenable number.

6128209 is a deficient number, since it is larger than the sum of its proper divisors (6371).

6128209 is a wasteful number, since it uses less digits than its factorization.

6128209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 6128209 is about 2475.5219651621. The cubic root of 6128209 is about 182.9972328804.

The spelling of 6128209 in words is "six million, one hundred twenty-eight thousand, two hundred nine".