428340958109 has 2 divisors, whose sum is σ = 428340958110. Its totient is φ = 428340958108.

The previous prime is 428340958103. The next prime is 428340958117. The reversal of 428340958109 is 901859043824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330628450009 + 97712508100 = 575003^2 + 312590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428340958109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428340958103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214170479054 + 214170479055.

It is an arithmetic number, because the mean of its divisors is an integer number (214170479055).

Almost surely, 2^428340958109 is an apocalyptic number.

It is an amenable number.

428340958109 is a deficient number, since it is larger than the sum of its proper divisors (1).

428340958109 is an equidigital number, since it uses as much as digits as its factorization.

428340958109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 428340958109 in words is "four hundred twenty-eight billion, three hundred forty million, nine hundred fifty-eight thousand, one hundred nine".