655573489 has 2 divisors, whose sum is σ = 655573490. Its totient is φ = 655573488.

The previous prime is 655573487. The next prime is 655573547. The reversal of 655573489 is 984375556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615883489 + 39690000 = 24817^2 + 6300^2 .

It is a cyclic number.

It is not a de Polignac number, because 655573489 - 2¹ = 655573487 is a prime.

Together with 655573487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (655573487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327786744 + 327786745.

It is an arithmetic number, because the mean of its divisors is an integer number (327786745).

Almost surely, 2^655573489 is an apocalyptic number.

It is an amenable number.

655573489 is a deficient number, since it is larger than the sum of its proper divisors (1).

655573489 is an equidigital number, since it uses as much as digits as its factorization.

655573489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 52.

The square root of 655573489 is about 25604.1693675073. The cubic root of 655573489 is about 868.7079464556.

The spelling of 655573489 in words is "six hundred fifty-five million, five hundred seventy-three thousand, four hundred eighty-nine".