655220017 has 2 divisors, whose sum is σ = 655220018. Its totient is φ = 655220016.

The previous prime is 655219987. The next prime is 655220039. The reversal of 655220017 is 710022556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572118561 + 83101456 = 23919^2 + 9116^2 .

It is a cyclic number.

It is not a de Polignac number, because 655220017 - 2⁷ = 655219889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (655220077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327610008 + 327610009.

It is an arithmetic number, because the mean of its divisors is an integer number (327610009).

Almost surely, 2^655220017 is an apocalyptic number.

It is an amenable number.

655220017 is a deficient number, since it is larger than the sum of its proper divisors (1).

655220017 is an equidigital number, since it uses as much as digits as its factorization.

655220017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 655220017 is about 25597.2658110197. The cubic root of 655220017 is about 868.5517884533.

It can be divided in two parts, 6552 and 20017, that added together give a square (26569 = 163²).

The spelling of 655220017 in words is "six hundred fifty-five million, two hundred twenty thousand, seventeen".