68648287 has 2 divisors, whose sum is σ = 68648288. Its totient is φ = 68648286.

The previous prime is 68648257. The next prime is 68648299. The reversal of 68648287 is 78284686.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68648287 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68648287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68648207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34324143 + 34324144.

It is an arithmetic number, because the mean of its divisors is an integer number (34324144).

Almost surely, 2^68648287 is an apocalyptic number.

68648287 is a deficient number, since it is larger than the sum of its proper divisors (1).

68648287 is an equidigital number, since it uses as much as digits as its factorization.

68648287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1032192, while the sum is 49.

The square root of 68648287 is about 8285.4261809517. The cubic root of 68648287 is about 409.4585098324.

It can be divided in two parts, 6864 and 8287, that added together give a palindrome (15151).

The spelling of 68648287 in words is "sixty-eight million, six hundred forty-eight thousand, two hundred eighty-seven".