268378387 has 2 divisors, whose sum is σ = 268378388. Its totient is φ = 268378386.

The previous prime is 268378381. The next prime is 268378391. The reversal of 268378387 is 783873862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268378387 - 2¹⁹ = 267854099 is a prime.

It is not a weakly prime, because it can be changed into another prime (268378381) 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, 134189193 + 134189194.

It is an arithmetic number, because the mean of its divisors is an integer number (134189194).

Almost surely, 2^268378387 is an apocalyptic number.

268378387 is a deficient number, since it is larger than the sum of its proper divisors (1).

268378387 is an equidigital number, since it uses as much as digits as its factorization.

268378387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 52.

The square root of 268378387 is about 16382.2582997583. The cubic root of 268378387 is about 645.0338599695.

The spelling of 268378387 in words is "two hundred sixty-eight million, three hundred seventy-eight thousand, three hundred eighty-seven".