2043120509 has 2 divisors, whose sum is σ = 2043120510. Its totient is φ = 2043120508.

The previous prime is 2043120493. The next prime is 2043120517. The reversal of 2043120509 is 9050213402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1638225625 + 404894884 = 40475^2 + 20122^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043120509 - 2⁴ = 2043120493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2043120529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021560254 + 1021560255.

It is an arithmetic number, because the mean of its divisors is an integer number (1021560255).

Almost surely, 2^2043120509 is an apocalyptic number.

It is an amenable number.

2043120509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043120509 is an equidigital number, since it uses as much as digits as its factorization.

2043120509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2043120509 is about 45200.8905775096. The cubic root of 2043120509 is about 1268.9114836512.

The spelling of 2043120509 in words is "two billion, forty-three million, one hundred twenty thousand, five hundred nine".