28773332909 has 2 divisors, whose sum is σ = 28773332910. Its totient is φ = 28773332908.

The previous prime is 28773332893. The next prime is 28773332921. The reversal of 28773332909 is 90923337782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24826729225 + 3946603684 = 157565^2 + 62822^2 .

It is a cyclic number.

It is not a de Polignac number, because 28773332909 - 2⁴ = 28773332893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28773335909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14386666454 + 14386666455.

It is an arithmetic number, because the mean of its divisors is an integer number (14386666455).

Almost surely, 2^28773332909 is an apocalyptic number.

It is an amenable number.

28773332909 is a deficient number, since it is larger than the sum of its proper divisors (1).

28773332909 is an equidigital number, since it uses as much as digits as its factorization.

28773332909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3429216, while the sum is 53.

The spelling of 28773332909 in words is "twenty-eight billion, seven hundred seventy-three million, three hundred thirty-two thousand, nine hundred nine".