268928993 has 2 divisors, whose sum is σ = 268928994. Its totient is φ = 268928992.

The previous prime is 268928981. The next prime is 268929013. The reversal of 268928993 is 399829862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263965009 + 4963984 = 16247^2 + 2228^2 .

It is a cyclic number.

It is not a de Polignac number, because 268928993 - 2¹⁶ = 268863457 is a prime.

It is not a weakly prime, because it can be changed into another prime (268928953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134464496 + 134464497.

It is an arithmetic number, because the mean of its divisors is an integer number (134464497).

Almost surely, 2^268928993 is an apocalyptic number.

It is an amenable number.

268928993 is a deficient number, since it is larger than the sum of its proper divisors (1).

268928993 is an equidigital number, since it uses as much as digits as its factorization.

268928993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 56.

The square root of 268928993 is about 16399.0546373869. The cubic root of 268928993 is about 645.4746765243.

The spelling of 268928993 in words is "two hundred sixty-eight million, nine hundred twenty-eight thousand, nine hundred ninety-three".