5605649 has 16 divisors (see below), whose sum is σ = 6672000. Its totient is φ = 4706352.

The previous prime is 5605619. The next prime is 5605661. The reversal of 5605649 is 9465065.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-5605649 is a prime.

It is a super-2 number, since 2×5605649² = 62846601422402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5605619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20099 + ... + 20375.

It is an arithmetic number, because the mean of its divisors is an integer number (417000).

Almost surely, 2^5605649 is an apocalyptic number.

5605649 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

5605649 is a deficient number, since it is larger than the sum of its proper divisors (1066351).

5605649 is an equidigital number, since it uses as much as digits as its factorization.

5605649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 5605649 is about 2367.6251814846. The cubic root of 5605649 is about 177.6404918259.

It can be divided in two parts, 560564 and 9, that multiplied together give a triangular number (5045076 = T₃₁₇₆).

The spelling of 5605649 in words is "five million, six hundred five thousand, six hundred forty-nine".