1028666123 has 2 divisors, whose sum is σ = 1028666124. Its totient is φ = 1028666122.

The previous prime is 1028666077. The next prime is 1028666143. The reversal of 1028666123 is 3216668201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1028666123 - 2²⁴ = 1011888907 is a prime.

It is a super-2 number, since 2×1028666123² = 2116307985215702258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1028666143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514333061 + 514333062.

It is an arithmetic number, because the mean of its divisors is an integer number (514333062).

Almost surely, 2^1028666123 is an apocalyptic number.

1028666123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028666123 is an equidigital number, since it uses as much as digits as its factorization.

1028666123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1028666123 is about 32072.8253042977. The cubic root of 1028666123 is about 1009.4654960293.

The spelling of 1028666123 in words is "one billion, twenty-eight million, six hundred sixty-six thousand, one hundred twenty-three".