234365421509 has 2 divisors, whose sum is σ = 234365421510. Its totient is φ = 234365421508.

The previous prime is 234365421503. The next prime is 234365421533. The reversal of 234365421509 is 905124563432.

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., 230666957284 + 3698464225 = 480278^2 + 60815^2 .

It is a cyclic number.

It is not a de Polignac number, because 234365421509 - 2⁸ = 234365421253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 234365421509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234365421503) 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, 117182710754 + 117182710755.

It is an arithmetic number, because the mean of its divisors is an integer number (117182710755).

Almost surely, 2^234365421509 is an apocalyptic number.

It is an amenable number.

234365421509 is a deficient number, since it is larger than the sum of its proper divisors (1).

234365421509 is an equidigital number, since it uses as much as digits as its factorization.

234365421509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 234365421509 in words is "two hundred thirty-four billion, three hundred sixty-five million, four hundred twenty-one thousand, five hundred nine".