655422517 has 2 divisors, whose sum is σ = 655422518. Its totient is φ = 655422516.

The previous prime is 655422479. The next prime is 655422569. The reversal of 655422517 is 715224556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630562321 + 24860196 = 25111^2 + 4986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655422517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655422577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327711258 + 327711259.

It is an arithmetic number, because the mean of its divisors is an integer number (327711259).

Almost surely, 2^655422517 is an apocalyptic number.

It is an amenable number.

655422517 is a deficient number, since it is larger than the sum of its proper divisors (1).

655422517 is an equidigital number, since it uses as much as digits as its factorization.

655422517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 37.

The square root of 655422517 is about 25601.2210060380. The cubic root of 655422517 is about 868.6412564267.

The spelling of 655422517 in words is "six hundred fifty-five million, four hundred twenty-two thousand, five hundred seventeen".