268746521 has 2 divisors, whose sum is σ = 268746522. Its totient is φ = 268746520.

The previous prime is 268746497. The next prime is 268746539. The reversal of 268746521 is 125647862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264420121 + 4326400 = 16261^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 268746521 - 2¹⁰ = 268745497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268743521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134373260 + 134373261.

It is an arithmetic number, because the mean of its divisors is an integer number (134373261).

Almost surely, 2^268746521 is an apocalyptic number.

It is an amenable number.

268746521 is a deficient number, since it is larger than the sum of its proper divisors (1).

268746521 is an equidigital number, since it uses as much as digits as its factorization.

268746521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 268746521 is about 16393.4902019064. The cubic root of 268746521 is about 645.3286556948.

The spelling of 268746521 in words is "two hundred sixty-eight million, seven hundred forty-six thousand, five hundred twenty-one".