288106661 has 2 divisors, whose sum is σ = 288106662. Its totient is φ = 288106660.

The previous prime is 288106649. The next prime is 288106669. The reversal of 288106661 is 166601882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253414561 + 34692100 = 15919^2 + 5890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-288106661 is a prime.

It is a super-2 number, since 2×288106661² = 166010896225137842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288106669) 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, 144053330 + 144053331.

It is an arithmetic number, because the mean of its divisors is an integer number (144053331).

Almost surely, 2^288106661 is an apocalyptic number.

It is an amenable number.

288106661 is a deficient number, since it is larger than the sum of its proper divisors (1).

288106661 is an equidigital number, since it uses as much as digits as its factorization.

288106661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 288106661 is about 16973.7049874210. The cubic root of 288106661 is about 660.4669644534.

The spelling of 288106661 in words is "two hundred eighty-eight million, one hundred six thousand, six hundred sixty-one".