10043420209 has 2 divisors, whose sum is σ = 10043420210. Its totient is φ = 10043420208.

The previous prime is 10043420203. The next prime is 10043420239. The reversal of 10043420209 is 90202434001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9319971600 + 723448609 = 96540^2 + 26897^2 .

It is a cyclic number.

It is not a de Polignac number, because 10043420209 - 2³ = 10043420201 is a prime.

It is not a weakly prime, because it can be changed into another prime (10043420201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5021710104 + 5021710105.

It is an arithmetic number, because the mean of its divisors is an integer number (5021710105).

Almost surely, 2^10043420209 is an apocalyptic number.

It is an amenable number.

10043420209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10043420209 is an equidigital number, since it uses as much as digits as its factorization.

10043420209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 10043420209 in words is "ten billion, forty-three million, four hundred twenty thousand, two hundred nine".