428923220009 has 2 divisors, whose sum is σ = 428923220010. Its totient is φ = 428923220008.

The previous prime is 428923219981. The next prime is 428923220041. The reversal of 428923220009 is 900022329824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260970787609 + 167952432400 = 510853^2 + 409820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428923220009 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 (428923220309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214461610004 + 214461610005.

It is an arithmetic number, because the mean of its divisors is an integer number (214461610005).

Almost surely, 2^428923220009 is an apocalyptic number.

It is an amenable number.

428923220009 is a deficient number, since it is larger than the sum of its proper divisors (1).

428923220009 is an equidigital number, since it uses as much as digits as its factorization.

428923220009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 428923220009 in words is "four hundred twenty-eight billion, nine hundred twenty-three million, two hundred twenty thousand, nine".