6491749 has 16 divisors (see below), whose sum is σ = 7560000. Its totient is φ = 5512320.

The previous prime is 6491747. The next prime is 6491759. The reversal of 6491749 is 9471946.

It is a happy number.

It is not a de Polignac number, because 6491749 - 2¹ = 6491747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6491747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18427 + ... + 18775.

It is an arithmetic number, because the mean of its divisors is an integer number (472500).

Almost surely, 2^6491749 is an apocalyptic number.

It is an amenable number.

6491749 is a deficient number, since it is larger than the sum of its proper divisors (1068251).

6491749 is a wasteful number, since it uses less digits than its factorization.

6491749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its digits is 54432, while the sum is 40.

The square root of 6491749 is about 2547.8910887242. The cubic root of 6491749 is about 186.5465578670.

The spelling of 6491749 in words is "six million, four hundred ninety-one thousand, seven hundred forty-nine".