223648657 has 2 divisors, whose sum is σ = 223648658. Its totient is φ = 223648656.

The previous prime is 223648627. The next prime is 223648669. The reversal of 223648657 is 756846322.

223648657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174662656 + 48986001 = 13216^2 + 6999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223648657 is a prime.

It is not a weakly prime, because it can be changed into another prime (223648627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111824328 + 111824329.

It is an arithmetic number, because the mean of its divisors is an integer number (111824329).

Almost surely, 2^223648657 is an apocalyptic number.

It is an amenable number.

223648657 is a deficient number, since it is larger than the sum of its proper divisors (1).

223648657 is an equidigital number, since it uses as much as digits as its factorization.

223648657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 43.

The square root of 223648657 is about 14954.8873950960. The cubic root of 223648657 is about 607.0001031350. Note that the first 3 decimals are identical.

The spelling of 223648657 in words is "two hundred twenty-three million, six hundred forty-eight thousand, six hundred fifty-seven".