268915109 has 2 divisors, whose sum is σ = 268915110. Its totient is φ = 268915108.

The previous prime is 268915093. The next prime is 268915117. The reversal of 268915109 is 901519862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195384484 + 73530625 = 13978^2 + 8575^2 .

It is a cyclic number.

It is not a de Polignac number, because 268915109 - 2⁴ = 268915093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268915159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134457554 + 134457555.

It is an arithmetic number, because the mean of its divisors is an integer number (134457555).

Almost surely, 2^268915109 is an apocalyptic number.

It is an amenable number.

268915109 is a deficient number, since it is larger than the sum of its proper divisors (1).

268915109 is an equidigital number, since it uses as much as digits as its factorization.

268915109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 268915109 is about 16398.6313148384. The cubic root of 268915109 is about 645.4635683572.

The spelling of 268915109 in words is "two hundred sixty-eight million, nine hundred fifteen thousand, one hundred nine".