553643 has 2 divisors, whose sum is σ = 553644. Its totient is φ = 553642.

The previous prime is 553627. The next prime is 553649. The reversal of 553643 is 346355.

553643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 553643 - 2⁴ = 553627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (553649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276821 + 276822.

It is an arithmetic number, because the mean of its divisors is an integer number (276822).

2⁵⁵³⁶⁴³ is an apocalyptic number.

553643 is a deficient number, since it is larger than the sum of its proper divisors (1).

553643 is an equidigital number, since it uses as much as digits as its factorization.

553643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 26.

The square root of 553643 is about 744.0719051275. The cubic root of 553643 is about 82.1126253318.

Adding to 553643 its reverse (346355), we get a palindrome (899998).

The spelling of 553643 in words is "five hundred fifty-three thousand, six hundred forty-three".