655918097 has 2 divisors, whose sum is σ = 655918098. Its totient is φ = 655918096.

The previous prime is 655918091. The next prime is 655918099. The reversal of 655918097 is 790819556.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638269696 + 17648401 = 25264^2 + 4201^2 .

It is a cyclic number.

It is not a de Polignac number, because 655918097 - 2¹⁴ = 655901713 is a prime.

Together with 655918099, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (655918091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327959048 + 327959049.

It is an arithmetic number, because the mean of its divisors is an integer number (327959049).

Almost surely, 2^655918097 is an apocalyptic number.

It is an amenable number.

655918097 is a deficient number, since it is larger than the sum of its proper divisors (1).

655918097 is an equidigital number, since it uses as much as digits as its factorization.

655918097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 655918097 is about 25610.8980123697. The cubic root of 655918097 is about 868.8601344630.

The spelling of 655918097 in words is "six hundred fifty-five million, nine hundred eighteen thousand, ninety-seven".