268486261 has 2 divisors, whose sum is σ = 268486262. Its totient is φ = 268486260.

The previous prime is 268486259. The next prime is 268486277. The reversal of 268486261 is 162684862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190605636 + 77880625 = 13806^2 + 8825^2 .

It is a cyclic number.

It is not a de Polignac number, because 268486261 - 2¹ = 268486259 is a prime.

Together with 268486259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268486201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134243130 + 134243131.

It is an arithmetic number, because the mean of its divisors is an integer number (134243131).

Almost surely, 2^268486261 is an apocalyptic number.

It is an amenable number.

268486261 is a deficient number, since it is larger than the sum of its proper divisors (1).

268486261 is an equidigital number, since it uses as much as digits as its factorization.

268486261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 43.

The square root of 268486261 is about 16385.5503722029. The cubic root of 268486261 is about 645.1202716247.

The spelling of 268486261 in words is "two hundred sixty-eight million, four hundred eighty-six thousand, two hundred sixty-one".