553649 has 2 divisors, whose sum is σ = 553650. Its totient is φ = 553648.

The previous prime is 553643. The next prime is 553667. The reversal of 553649 is 946355.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552049 + 1600 = 743^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 553649 - 2¹² = 549553 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276824 + 276825.

It is an arithmetic number, because the mean of its divisors is an integer number (276825).

2⁵⁵³⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

553649 is a deficient number, since it is larger than the sum of its proper divisors (1).

553649 is an equidigital number, since it uses as much as digits as its factorization.

553649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

The square root of 553649 is about 744.0759369849. The cubic root of 553649 is about 82.1129219573.

The spelling of 553649 in words is "five hundred fifty-three thousand, six hundred forty-nine".