6450909 has 4 divisors (see below), whose sum is σ = 8601216. Its totient is φ = 4300604.

The previous prime is 6450907. The next prime is 6450929. The reversal of 6450909 is 9090546.

It is a happy number.

6450909 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 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 6450909 - 2¹ = 6450907 is a prime.

It is a super-2 number, since 2×6450909² = 83228453852562, which contains 22 as substring.

It is a D-number.

6450909 is a modest number, since divided by 909 gives 645 as remainder.

6450909 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6450909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6450901) 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, 1075149 + ... + 1075154.

It is an arithmetic number, because the mean of its divisors is an integer number (2150304).

Almost surely, 2^6450909 is an apocalyptic number.

It is an amenable number.

6450909 is a deficient number, since it is larger than the sum of its proper divisors (2150307).

6450909 is a wasteful number, since it uses less digits than its factorization.

6450909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150306.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 6450909 is about 2539.8639727355. The cubic root of 6450909 is about 186.1545426192.

The spelling of 6450909 in words is "six million, four hundred fifty thousand, nine hundred nine".