654640241 has 2 divisors, whose sum is σ = 654640242. Its totient is φ = 654640240.

The previous prime is 654640219. The next prime is 654640247. The reversal of 654640241 is 142046456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 645160000 + 9480241 = 25400^2 + 3079^2 .

It is a cyclic number.

It is not a de Polignac number, because 654640241 - 2⁶ = 654640177 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 654640198 and 654640207.

It is not a weakly prime, because it can be changed into another prime (654640247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327320120 + 327320121.

It is an arithmetic number, because the mean of its divisors is an integer number (327320121).

Almost surely, 2^654640241 is an apocalyptic number.

It is an amenable number.

654640241 is a deficient number, since it is larger than the sum of its proper divisors (1).

654640241 is an equidigital number, since it uses as much as digits as its factorization.

654640241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 654640241 is about 25585.9383451145. The cubic root of 654640241 is about 868.2955314864.

Adding to 654640241 its reverse (142046456), we get a palindrome (796686697).

The spelling of 654640241 in words is "six hundred fifty-four million, six hundred forty thousand, two hundred forty-one".