555109 has 2 divisors, whose sum is σ = 555110. Its totient is φ = 555108.

The previous prime is 555097. The next prime is 555119. The reversal of 555109 is 901555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 14884 = 735^2 + 122^2 .

It is a cyclic number.

It is not a de Polignac number, because 555109 - 2⁵ = 555077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277554 + 277555.

It is an arithmetic number, because the mean of its divisors is an integer number (277555).

2⁵⁵⁵¹⁰⁹ is an apocalyptic number.

It is an amenable number.

555109 is a deficient number, since it is larger than the sum of its proper divisors (1).

555109 is an equidigital number, since it uses as much as digits as its factorization.

555109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 555109 is about 745.0563737060. The cubic root of 555109 is about 82.1850372261.

The spelling of 555109 in words is "five hundred fifty-five thousand, one hundred nine".