234231509 has 2 divisors, whose sum is σ = 234231510. Its totient is φ = 234231508.

The previous prime is 234231467. The next prime is 234231527. The reversal of 234231509 is 905132432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224340484 + 9891025 = 14978^2 + 3145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234231509 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234231209) 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, 117115754 + 117115755.

It is an arithmetic number, because the mean of its divisors is an integer number (117115755).

Almost surely, 2^234231509 is an apocalyptic number.

It is an amenable number.

234231509 is a deficient number, since it is larger than the sum of its proper divisors (1).

234231509 is an equidigital number, since it uses as much as digits as its factorization.

234231509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 234231509 is about 15304.6237784534. The cubic root of 234231509 is about 616.4271691676.

The spelling of 234231509 in words is "two hundred thirty-four million, two hundred thirty-one thousand, five hundred nine".