288126661 has 2 divisors, whose sum is σ = 288126662. Its totient is φ = 288126660.

The previous prime is 288126649. The next prime is 288126673. The reversal of 288126661 is 166621882.

It is a balanced prime because it is at equal distance from previous prime (288126649) and next prime (288126673).

It can be written as a sum of positive squares in only one way, i.e., 173422561 + 114704100 = 13169^2 + 10710^2 .

It is a cyclic number.

It is not a de Polignac number, because 288126661 - 2⁷ = 288126533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288126611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144063330 + 144063331.

It is an arithmetic number, because the mean of its divisors is an integer number (144063331).

Almost surely, 2^288126661 is an apocalyptic number.

It is an amenable number.

288126661 is a deficient number, since it is larger than the sum of its proper divisors (1).

288126661 is an equidigital number, since it uses as much as digits as its factorization.

288126661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 40.

The square root of 288126661 is about 16974.2941237626. The cubic root of 288126661 is about 660.4822470269.

The spelling of 288126661 in words is "two hundred eighty-eight million, one hundred twenty-six thousand, six hundred sixty-one".