268489783 has 2 divisors, whose sum is σ = 268489784. Its totient is φ = 268489782.

The previous prime is 268489777. The next prime is 268489799. The reversal of 268489783 is 387984862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268489783 - 2⁵ = 268489751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268489733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134244891 + 134244892.

It is an arithmetic number, because the mean of its divisors is an integer number (134244892).

Almost surely, 2^268489783 is an apocalyptic number.

268489783 is a deficient number, since it is larger than the sum of its proper divisors (1).

268489783 is an equidigital number, since it uses as much as digits as its factorization.

268489783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The square root of 268489783 is about 16385.6578445908. The cubic root of 268489783 is about 645.1230925060.

The spelling of 268489783 in words is "two hundred sixty-eight million, four hundred eighty-nine thousand, seven hundred eighty-three".