4086649 has 6 divisors (see below), whose sum is σ = 4753914. Its totient is φ = 3502800.

The previous prime is 4086631. The next prime is 4086673. The reversal of 4086649 is 9466804.

It can be written as a sum of positive squares in only one way, i.e., 3732624 + 354025 = 1932^2 + 595^2 .

It is not a de Polignac number, because 4086649 - 2⁷ = 4086521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4086679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41652 + ... + 41749.

It is an arithmetic number, because the mean of its divisors is an integer number (792319).

Almost surely, 2^4086649 is an apocalyptic number.

4086649 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

4086649 is a deficient number, since it is larger than the sum of its proper divisors (667265).

4086649 is an equidigital number, since it uses as much as digits as its factorization.

4086649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83415 (or 83408 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 4086649 is about 2021.5461904196. The cubic root of 4086649 is about 159.8781494138.

The spelling of 4086649 in words is "four million, eighty-six thousand, six hundred forty-nine".