4491649 has 8 divisors (see below), whose sum is σ = 4618368. Its totient is φ = 4366320.

The previous prime is 4491631. The next prime is 4491653. The reversal of 4491649 is 9461944.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4491649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4491659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10459 + ... + 10879.

It is an arithmetic number, because the mean of its divisors is an integer number (577296).

Almost surely, 2^4491649 is an apocalyptic number.

It is an amenable number.

4491649 is a deficient number, since it is larger than the sum of its proper divisors (126719).

4491649 is a wasteful number, since it uses less digits than its factorization.

4491649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695.

The product of its digits is 31104, while the sum is 37.

The square root of 4491649 is about 2119.3510799299. The cubic root of 4491649 is about 164.9941718174.

The spelling of 4491649 in words is "four million, four hundred ninety-one thousand, six hundred forty-nine".