268217399 has 2 divisors, whose sum is σ = 268217400. Its totient is φ = 268217398.

The previous prime is 268217377. The next prime is 268217401. The reversal of 268217399 is 993712862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268217399 is a prime.

Together with 268217401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268217309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134108699 + 134108700.

It is an arithmetic number, because the mean of its divisors is an integer number (134108700).

Almost surely, 2^268217399 is an apocalyptic number.

268217399 is a deficient number, since it is larger than the sum of its proper divisors (1).

268217399 is an equidigital number, since it uses as much as digits as its factorization.

268217399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 268217399 is about 16377.3440764979. The cubic root of 268217399 is about 644.9048586707.

The spelling of 268217399 in words is "two hundred sixty-eight million, two hundred seventeen thousand, three hundred ninety-nine".