655593109 has 2 divisors, whose sum is σ = 655593110. Its totient is φ = 655593108.

The previous prime is 655593101. The next prime is 655593131. The reversal of 655593109 is 901395556.

655593109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526702500 + 128890609 = 22950^2 + 11353^2 .

It is a cyclic number.

It is not a de Polignac number, because 655593109 - 2³ = 655593101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655593101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327796554 + 327796555.

It is an arithmetic number, because the mean of its divisors is an integer number (327796555).

Almost surely, 2^655593109 is an apocalyptic number.

It is an amenable number.

655593109 is a deficient number, since it is larger than the sum of its proper divisors (1).

655593109 is an equidigital number, since it uses as much as digits as its factorization.

655593109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 182250, while the sum is 43.

The square root of 655593109 is about 25604.5525053651. The cubic root of 655593109 is about 868.7166125982.

The spelling of 655593109 in words is "six hundred fifty-five million, five hundred ninety-three thousand, one hundred nine".