655918313 has 2 divisors, whose sum is σ = 655918314. Its totient is φ = 655918312.

The previous prime is 655918279. The next prime is 655918339. The reversal of 655918313 is 313819556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407918809 + 247999504 = 20197^2 + 15748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655918313 is a prime.

It is not a weakly prime, because it can be changed into another prime (655914313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327959156 + 327959157.

It is an arithmetic number, because the mean of its divisors is an integer number (327959157).

Almost surely, 2^655918313 is an apocalyptic number.

It is an amenable number.

655918313 is a deficient number, since it is larger than the sum of its proper divisors (1).

655918313 is an equidigital number, since it uses as much as digits as its factorization.

655918313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 41.

The square root of 655918313 is about 25610.9022293241. The cubic root of 655918313 is about 868.8602298376.

The spelling of 655918313 in words is "six hundred fifty-five million, nine hundred eighteen thousand, three hundred thirteen".