268721273 has 2 divisors, whose sum is σ = 268721274. Its totient is φ = 268721272.

The previous prime is 268721251. The next prime is 268721291. The reversal of 268721273 is 372127862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257377849 + 11343424 = 16043^2 + 3368^2 .

It is a cyclic number.

It is not a de Polignac number, because 268721273 - 2⁶ = 268721209 is a prime.

It is a super-2 number, since 2×268721273² = 144422245125481058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (268721473) 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, 134360636 + 134360637.

It is an arithmetic number, because the mean of its divisors is an integer number (134360637).

Almost surely, 2^268721273 is an apocalyptic number.

It is an amenable number.

268721273 is a deficient number, since it is larger than the sum of its proper divisors (1).

268721273 is an equidigital number, since it uses as much as digits as its factorization.

268721273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 38.

The square root of 268721273 is about 16392.7201220542. The cubic root of 268721273 is about 645.3084461084.

The spelling of 268721273 in words is "two hundred sixty-eight million, seven hundred twenty-one thousand, two hundred seventy-three".