655622117 has 2 divisors, whose sum is σ = 655622118. Its totient is φ = 655622116.

The previous prime is 655622087. The next prime is 655622141. The reversal of 655622117 is 711226556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428034721 + 227587396 = 20689^2 + 15086^2 .

It is a cyclic number.

It is not a de Polignac number, because 655622117 - 2¹⁸ = 655359973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655622917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327811058 + 327811059.

It is an arithmetic number, because the mean of its divisors is an integer number (327811059).

Almost surely, 2^655622117 is an apocalyptic number.

It is an amenable number.

655622117 is a deficient number, since it is larger than the sum of its proper divisors (1).

655622117 is an equidigital number, since it uses as much as digits as its factorization.

655622117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 655622117 is about 25605.1189608641. The cubic root of 655622117 is about 868.7294250980.

The spelling of 655622117 in words is "six hundred fifty-five million, six hundred twenty-two thousand, one hundred seventeen".