1023443009 has 2 divisors, whose sum is σ = 1023443010. Its totient is φ = 1023443008.

The previous prime is 1023442997. The next prime is 1023443209. The reversal of 1023443009 is 9003443201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527712784 + 495730225 = 22972^2 + 22265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023443009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1023443209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511721504 + 511721505.

It is an arithmetic number, because the mean of its divisors is an integer number (511721505).

Almost surely, 2^1023443009 is an apocalyptic number.

It is an amenable number.

1023443009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023443009 is an equidigital number, since it uses as much as digits as its factorization.

1023443009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1023443009 is about 31991.2958318353. The cubic root of 1023443009 is about 1007.7540555507.

The spelling of 1023443009 in words is "one billion, twenty-three million, four hundred forty-three thousand, nine".