6649219 has 8 divisors (see below), whose sum is σ = 6842880. Its totient is φ = 6457416.

The previous prime is 6649199. The next prime is 6649229. The reversal of 6649219 is 9129466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6649219 - 2¹³ = 6641027 is a prime.

It is a super-2 number, since 2×6649219² = 88424226619922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6649229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9954 + ... + 10600.

It is an arithmetic number, because the mean of its divisors is an integer number (855360).

Almost surely, 2^6649219 is an apocalyptic number.

6649219 is a deficient number, since it is larger than the sum of its proper divisors (193661).

6649219 is a wasteful number, since it uses less digits than its factorization.

6649219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929.

The product of its digits is 23328, while the sum is 37.

The square root of 6649219 is about 2578.6079577943. The cubic root of 6649219 is about 188.0428735025.

The spelling of 6649219 in words is "six million, six hundred forty-nine thousand, two hundred nineteen".