268999217 has 2 divisors, whose sum is σ = 268999218. Its totient is φ = 268999216.

The previous prime is 268999151. The next prime is 268999219. The reversal of 268999217 is 712999862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232227121 + 36772096 = 15239^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 268999217 - 2¹⁶ = 268933681 is a prime.

It is a super-2 number, since 2×268999217² = 144721157493226178, which contains 22 as substring.

Together with 268999219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268999219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134499608 + 134499609.

It is an arithmetic number, because the mean of its divisors is an integer number (134499609).

Almost surely, 2^268999217 is an apocalyptic number.

It is an amenable number.

268999217 is a deficient number, since it is larger than the sum of its proper divisors (1).

268999217 is an equidigital number, since it uses as much as digits as its factorization.

268999217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 268999217 is about 16401.1955966631. The cubic root of 268999217 is about 645.5308547598.

The spelling of 268999217 in words is "two hundred sixty-eight million, nine hundred ninety-nine thousand, two hundred seventeen".