656230689 has 9 divisors (see below), whose sum is σ = 947999793. Its totient is φ = 437435892.

The previous prime is 656230681. The next prime is 656230699. The reversal of 656230689 is 986032656.

It is a happy number.

The square root of 656230689 is 25617.

It is a perfect power (a square), and thus also a powerful number.

656230689 is a `hidden beast` number, since 6 + 562 + 3 + 0 + 6 + 89 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 656230689 - 2³ = 656230681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656230681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 72582 + ... + 81120.

Almost surely, 2^656230689 is an apocalyptic number.

656230689 is the 25617-th square number.

656230689 is the 12809-th centered octagonal number.

It is an amenable number.

656230689 is a deficient number, since it is larger than the sum of its proper divisors (291769104).

656230689 is an frugal number, since it uses more digits than its factorization.

656230689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17084 (or 8542 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The cubic root of 656230689 is about 868.9981372586.

The spelling of 656230689 in words is "six hundred fifty-six million, two hundred thirty thousand, six hundred eighty-nine".