426432109 has 2 divisors, whose sum is σ = 426432110. Its totient is φ = 426432108.

The previous prime is 426432107. The next prime is 426432157. The reversal of 426432109 is 901234624.

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., 385022884 + 41409225 = 19622^2 + 6435^2 .

It is a cyclic number.

It is not a de Polignac number, because 426432109 - 2¹ = 426432107 is a prime.

Together with 426432107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426432101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213216054 + 213216055.

It is an arithmetic number, because the mean of its divisors is an integer number (213216055).

Almost surely, 2^426432109 is an apocalyptic number.

It is an amenable number.

426432109 is a deficient number, since it is larger than the sum of its proper divisors (1).

426432109 is an equidigital number, since it uses as much as digits as its factorization.

426432109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 426432109 is about 20650.2326621276. The cubic root of 426432109 is about 752.6908433077.

The spelling of 426432109 in words is "four hundred twenty-six million, four hundred thirty-two thousand, one hundred nine".