6649019 has 4 divisors (see below), whose sum is σ = 7160496. Its totient is φ = 6137544.

The previous prime is 6649007. The next prime is 6649063. The reversal of 6649019 is 9109466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9109466 = 2 ⋅4554733.

It is a cyclic number.

It is not a de Polignac number, because 6649019 - 2²⁰ = 5600443 is a prime.

It is a super-2 number, since 2×6649019² = 88418907324722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6649019.

It is not an unprimeable number, because it can be changed into a prime (6649099) 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, 255719 + ... + 255744.

It is an arithmetic number, because the mean of its divisors is an integer number (1790124).

Almost surely, 2^6649019 is an apocalyptic number.

6649019 is a deficient number, since it is larger than the sum of its proper divisors (511477).

6649019 is a wasteful number, since it uses less digits than its factorization.

6649019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511476.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 6649019 is about 2578.5691768886. The cubic root of 6649019 is about 188.0409881205.

The spelling of 6649019 in words is "six million, six hundred forty-nine thousand, nineteen".