655722247 has 2 divisors, whose sum is σ = 655722248. Its totient is φ = 655722246.

The previous prime is 655722241. The next prime is 655722253. The reversal of 655722247 is 742227556.

It is a balanced prime because it is at equal distance from previous prime (655722241) and next prime (655722253).

It is a cyclic number.

It is not a de Polignac number, because 655722247 - 2²³ = 647333639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655722241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327861123 + 327861124.

It is an arithmetic number, because the mean of its divisors is an integer number (327861124).

Almost surely, 2^655722247 is an apocalyptic number.

655722247 is a deficient number, since it is larger than the sum of its proper divisors (1).

655722247 is an equidigital number, since it uses as much as digits as its factorization.

655722247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 40.

The square root of 655722247 is about 25607.0741593022. The cubic root of 655722247 is about 868.7736484634.

The spelling of 655722247 in words is "six hundred fifty-five million, seven hundred twenty-two thousand, two hundred forty-seven".