288303661 has 2 divisors, whose sum is σ = 288303662. Its totient is φ = 288303660.

The previous prime is 288303637. The next prime is 288303749. The reversal of 288303661 is 166303882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227557225 + 60746436 = 15085^2 + 7794^2 .

It is a cyclic number.

It is not a de Polignac number, because 288303661 - 2¹¹ = 288301613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 288303661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288303611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144151830 + 144151831.

It is an arithmetic number, because the mean of its divisors is an integer number (144151831).

Almost surely, 2^288303661 is an apocalyptic number.

It is an amenable number.

288303661 is a deficient number, since it is larger than the sum of its proper divisors (1).

288303661 is an equidigital number, since it uses as much as digits as its factorization.

288303661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 288303661 is about 16979.5070894299. The cubic root of 288303661 is about 660.6174669872.

The spelling of 288303661 in words is "two hundred eighty-eight million, three hundred three thousand, six hundred sixty-one".