6449657 has 4 divisors (see below), whose sum is σ = 6456996. Its totient is φ = 6442320.

The previous prime is 6449617. The next prime is 6449659. The reversal of 6449657 is 7569446.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7569446 = 2 ⋅3784723.

It can be written as a sum of positive squares in 2 ways, for example, as 3613801 + 2835856 = 1901^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 6449657 - 2¹⁰ = 6448633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6449659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2138 + ... + 4179.

It is an arithmetic number, because the mean of its divisors is an integer number (1614249).

Almost surely, 2^6449657 is an apocalyptic number.

It is an amenable number.

6449657 is a deficient number, since it is larger than the sum of its proper divisors (7339).

6449657 is a wasteful number, since it uses less digits than its factorization.

6449657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7338.

The product of its digits is 181440, while the sum is 41.

The square root of 6449657 is about 2539.6174908832. The cubic root of 6449657 is about 186.1424988092.

It can be divided in two parts, 644 and 9657, that added together give a palindrome (10301).

The spelling of 6449657 in words is "six million, four hundred forty-nine thousand, six hundred fifty-seven".