2043203509 has 2 divisors, whose sum is σ = 2043203510. Its totient is φ = 2043203508.

The previous prime is 2043203489. The next prime is 2043203537. The reversal of 2043203509 is 9053023402.

It is an a-pointer prime, because the next prime (2043203537) can be obtained adding 2043203509 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1929844900 + 113358609 = 43930^2 + 10647^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043203509 - 2²⁷ = 1908985781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2043203579) 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, 1021601754 + 1021601755.

It is an arithmetic number, because the mean of its divisors is an integer number (1021601755).

Almost surely, 2^2043203509 is an apocalyptic number.

It is an amenable number.

2043203509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043203509 is an equidigital number, since it uses as much as digits as its factorization.

2043203509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 2043203509 is about 45201.8086916884. The cubic root of 2043203509 is about 1268.9286662283.

The spelling of 2043203509 in words is "two billion, forty-three million, two hundred three thousand, five hundred nine".