288228949 has 2 divisors, whose sum is σ = 288228950. Its totient is φ = 288228948.

The previous prime is 288228947. The next prime is 288228977. The reversal of 288228949 is 949822882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268140625 + 20088324 = 16375^2 + 4482^2 .

It is a cyclic number.

It is not a de Polignac number, because 288228949 - 2¹ = 288228947 is a prime.

Together with 288228947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 288228896 and 288228905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288228947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144114474 + 144114475.

It is an arithmetic number, because the mean of its divisors is an integer number (144114475).

Almost surely, 2^288228949 is an apocalyptic number.

It is an amenable number.

288228949 is a deficient number, since it is larger than the sum of its proper divisors (1).

288228949 is an equidigital number, since it uses as much as digits as its factorization.

288228949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 52.

The square root of 288228949 is about 16977.3068830130. The cubic root of 288228949 is about 660.5603971648.

The spelling of 288228949 in words is "two hundred eighty-eight million, two hundred twenty-eight thousand, nine hundred forty-nine".