555649 has 4 divisors (see below), whose sum is σ = 564820. Its totient is φ = 546480.

The previous prime is 555637. The next prime is 555661. The reversal of 555649 is 946555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946555 = 5 ⋅189311.

It is an interprime number because it is at equal distance from previous prime (555637) and next prime (555661).

It can be written as a sum of positive squares in 2 ways, for example, as 37249 + 518400 = 193^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 555649 - 2⁷ = 555521 is a prime.

It is a super-2 number, since 2×555649² = 617491622402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4494 + ... + 4615.

It is an arithmetic number, because the mean of its divisors is an integer number (141205).

2⁵⁵⁵⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

555649 is a deficient number, since it is larger than the sum of its proper divisors (9171).

555649 is an equidigital number, since it uses as much as digits as its factorization.

555649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9170.

The product of its digits is 27000, while the sum is 34.

The square root of 555649 is about 745.4186743032. The cubic root of 555649 is about 82.2116779623.

The spelling of 555649 in words is "five hundred fifty-five thousand, six hundred forty-nine".