6449729 has 32 divisors (see below), whose sum is σ = 8273664. Its totient is φ = 4942080.

The previous prime is 6449719. The next prime is 6449731. The reversal of 6449729 is 9279446.

It is not a de Polignac number, because 6449729 - 2⁸ = 6449473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6449719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121667 + ... + 121719.

It is an arithmetic number, because the mean of its divisors is an integer number (258552).

Almost surely, 2^6449729 is an apocalyptic number.

It is an amenable number.

6449729 is a deficient number, since it is larger than the sum of its proper divisors (1823935).

6449729 is a wasteful number, since it uses less digits than its factorization.

6449729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137.

The product of its digits is 108864, while the sum is 41.

The square root of 6449729 is about 2539.6316662067. The cubic root of 6449729 is about 186.1431914667.

It can be divided in two parts, 64 and 49729, that multiplied together give a square (3182656 = 1784²).

The spelling of 6449729 in words is "six million, four hundred forty-nine thousand, seven hundred twenty-nine".