288968857 has 2 divisors, whose sum is σ = 288968858. Its totient is φ = 288968856.

The previous prime is 288968837. The next prime is 288968921. The reversal of 288968857 is 758869882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240374016 + 48594841 = 15504^2 + 6971^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-288968857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 288968795 and 288968804.

It is not a weakly prime, because it can be changed into another prime (288968837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144484428 + 144484429.

It is an arithmetic number, because the mean of its divisors is an integer number (144484429).

Almost surely, 2^288968857 is an apocalyptic number.

It is an amenable number.

288968857 is a deficient number, since it is larger than the sum of its proper divisors (1).

288968857 is an equidigital number, since it uses as much as digits as its factorization.

288968857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 61.

The square root of 288968857 is about 16999.0840047339. The cubic root of 288968857 is about 661.1251522496.

The spelling of 288968857 in words is "two hundred eighty-eight million, nine hundred sixty-eight thousand, eight hundred fifty-seven".