68402287 has 2 divisors, whose sum is σ = 68402288. Its totient is φ = 68402286.

The previous prime is 68402281. The next prime is 68402303. The reversal of 68402287 is 78220486.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68402287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68402281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34201143 + 34201144.

It is an arithmetic number, because the mean of its divisors is an integer number (34201144).

Almost surely, 2^68402287 is an apocalyptic number.

68402287 is a deficient number, since it is larger than the sum of its proper divisors (1).

68402287 is an equidigital number, since it uses as much as digits as its factorization.

68402287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 68402287 is about 8270.5675137804. The cubic root of 68402287 is about 408.9688285137.

The spelling of 68402287 in words is "sixty-eight million, four hundred two thousand, two hundred eighty-seven".