6445109 has 4 divisors (see below), whose sum is σ = 7031040. Its totient is φ = 5859180.

The previous prime is 6445099. The next prime is 6445147. The reversal of 6445109 is 9015446.

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 6445109 - 2⁴ = 6445093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445169) 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, 292949 + ... + 292970.

It is an arithmetic number, because the mean of its divisors is an integer number (1757760).

Almost surely, 2^6445109 is an apocalyptic number.

It is an amenable number.

6445109 is a deficient number, since it is larger than the sum of its proper divisors (585931).

6445109 is a wasteful number, since it uses less digits than its factorization.

6445109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585930.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 6445109 is about 2538.7219225429. The cubic root of 6445109 is about 186.0987354922.

The spelling of 6445109 in words is "six million, four hundred forty-five thousand, one hundred nine".