1328330777 has 2 divisors, whose sum is σ = 1328330778. Its totient is φ = 1328330776.

The previous prime is 1328330671. The next prime is 1328330791. The reversal of 1328330777 is 7770338231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1137780361 + 190550416 = 33731^2 + 13804^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328330777 - 2¹⁰ = 1328329753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328330797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664165388 + 664165389.

It is an arithmetic number, because the mean of its divisors is an integer number (664165389).

Almost surely, 2^1328330777 is an apocalyptic number.

It is an amenable number.

1328330777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328330777 is an equidigital number, since it uses as much as digits as its factorization.

1328330777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 1328330777 is about 36446.2724705833. The cubic root of 1328330777 is about 1099.2641847656.

The spelling of 1328330777 in words is "one billion, three hundred twenty-eight million, three hundred thirty thousand, seven hundred seventy-seven".