67868287 has 2 divisors, whose sum is σ = 67868288. Its totient is φ = 67868286.

The previous prime is 67868237. The next prime is 67868291. The reversal of 67868287 is 78286876.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67868287 is a prime.

It is a super-2 number, since 2×67868287² = 9212208760628738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67868237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33934143 + 33934144.

It is an arithmetic number, because the mean of its divisors is an integer number (33934144).

Almost surely, 2^67868287 is an apocalyptic number.

67868287 is a deficient number, since it is larger than the sum of its proper divisors (1).

67868287 is an equidigital number, since it uses as much as digits as its factorization.

67868287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 52.

The square root of 67868287 is about 8238.2211065254. The cubic root of 67868287 is about 407.9018069959.

The spelling of 67868287 in words is "sixty-seven million, eight hundred sixty-eight thousand, two hundred eighty-seven".