68288287 has 2 divisors, whose sum is σ = 68288288. Its totient is φ = 68288286.

The previous prime is 68288267. The next prime is 68288309. The reversal of 68288287 is 78288286.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68288287 - 2¹⁹ = 67763999 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 68288287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68288237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34144143 + 34144144.

It is an arithmetic number, because the mean of its divisors is an integer number (34144144).

Almost surely, 2^68288287 is an apocalyptic number.

68288287 is a deficient number, since it is larger than the sum of its proper divisors (1).

68288287 is an equidigital number, since it uses as much as digits as its factorization.

68288287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 688128, while the sum is 49.

The square root of 68288287 is about 8263.6727306931. The cubic root of 68288287 is about 408.7415048720.

Subtracting 68288287 from its reverse (78288286), we obtain a palindrome (9999999).

The spelling of 68288287 in words is "sixty-eight million, two hundred eighty-eight thousand, two hundred eighty-seven".