288898721 has 2 divisors, whose sum is σ = 288898722. Its totient is φ = 288898720.

The previous prime is 288898693. The next prime is 288898733. The reversal of 288898721 is 127898882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201214225 + 87684496 = 14185^2 + 9364^2 .

It is a cyclic number.

It is not a de Polignac number, because 288898721 - 2⁶ = 288898657 is a prime.

It is not a weakly prime, because it can be changed into another prime (288898121) 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 as a sum of consecutive naturals, namely, 144449360 + 144449361.

It is an arithmetic number, because the mean of its divisors is an integer number (144449361).

Almost surely, 2^288898721 is an apocalyptic number.

It is an amenable number.

288898721 is a deficient number, since it is larger than the sum of its proper divisors (1).

288898721 is an equidigital number, since it uses as much as digits as its factorization.

288898721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1032192, while the sum is 53.

The square root of 288898721 is about 16997.0209448597. The cubic root of 288898721 is about 661.0716604119.

The spelling of 288898721 in words is "two hundred eighty-eight million, eight hundred ninety-eight thousand, seven hundred twenty-one".