1028363909 has 2 divisors, whose sum is σ = 1028363910. Its totient is φ = 1028363908.

The previous prime is 1028363893. The next prime is 1028363957. The reversal of 1028363909 is 9093638201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1017801409 + 10562500 = 31903^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028363909 - 2⁴ = 1028363893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1028363969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514181954 + 514181955.

It is an arithmetic number, because the mean of its divisors is an integer number (514181955).

Almost surely, 2^1028363909 is an apocalyptic number.

It is an amenable number.

1028363909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028363909 is an equidigital number, since it uses as much as digits as its factorization.

1028363909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1028363909 is about 32068.1135865520. The cubic root of 1028363909 is about 1009.3666286775.

The spelling of 1028363909 in words is "one billion, twenty-eight million, three hundred sixty-three thousand, nine hundred nine".