268341509 has 2 divisors, whose sum is σ = 268341510. Its totient is φ = 268341508.

The previous prime is 268341443. The next prime is 268341517. The reversal of 268341509 is 905143862.

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., 255040900 + 13300609 = 15970^2 + 3647^2 .

It is a cyclic number.

It is not a de Polignac number, because 268341509 - 2²⁰ = 267292933 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 (268341559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134170754 + 134170755.

It is an arithmetic number, because the mean of its divisors is an integer number (134170755).

Almost surely, 2^268341509 is an apocalyptic number.

It is an amenable number.

268341509 is a deficient number, since it is larger than the sum of its proper divisors (1).

268341509 is an equidigital number, since it uses as much as digits as its factorization.

268341509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 268341509 is about 16381.1327141929. The cubic root of 268341509 is about 645.0043138145.

The spelling of 268341509 in words is "two hundred sixty-eight million, three hundred forty-one thousand, five hundred nine".