655106609 has 2 divisors, whose sum is σ = 655106610. Its totient is φ = 655106608.

The previous prime is 655106597. The next prime is 655106623. The reversal of 655106609 is 906601556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 573746209 + 81360400 = 23953^2 + 9020^2 .

It is a cyclic number.

It is not a de Polignac number, because 655106609 - 2⁴ = 655106593 is a prime.

It is a super-3 number, since 3×655106609³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (655106689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327553304 + 327553305.

It is an arithmetic number, because the mean of its divisors is an integer number (327553305).

Almost surely, 2^655106609 is an apocalyptic number.

It is an amenable number.

655106609 is a deficient number, since it is larger than the sum of its proper divisors (1).

655106609 is an equidigital number, since it uses as much as digits as its factorization.

655106609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 655106609 is about 25595.0504785593. The cubic root of 655106609 is about 868.5016748008.

The spelling of 655106609 in words is "six hundred fifty-five million, one hundred six thousand, six hundred nine".