426505109 has 2 divisors, whose sum is σ = 426505110. Its totient is φ = 426505108.

The previous prime is 426505097. The next prime is 426505127. The reversal of 426505109 is 901505624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425596900 + 908209 = 20630^2 + 953^2 .

It is a cyclic number.

It is not a de Polignac number, because 426505109 - 2⁸ = 426504853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426505909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213252554 + 213252555.

It is an arithmetic number, because the mean of its divisors is an integer number (213252555).

Almost surely, 2^426505109 is an apocalyptic number.

It is an amenable number.

426505109 is a deficient number, since it is larger than the sum of its proper divisors (1).

426505109 is an equidigital number, since it uses as much as digits as its factorization.

426505109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 426505109 is about 20652.0001210537. Note that the first 3 decimals coincide. The cubic root of 426505109 is about 752.7337913685.

The spelling of 426505109 in words is "four hundred twenty-six million, five hundred five thousand, one hundred nine".