238529609 has 2 divisors, whose sum is σ = 238529610. Its totient is φ = 238529608.

The previous prime is 238529569. The next prime is 238529657. The reversal of 238529609 is 906925832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231131209 + 7398400 = 15203^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 238529609 - 2⁸ = 238529353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238529609.

It is not a weakly prime, because it can be changed into another prime (238529659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119264804 + 119264805.

It is an arithmetic number, because the mean of its divisors is an integer number (119264805).

Almost surely, 2^238529609 is an apocalyptic number.

It is an amenable number.

238529609 is a deficient number, since it is larger than the sum of its proper divisors (1).

238529609 is an equidigital number, since it uses as much as digits as its factorization.

238529609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 238529609 is about 15444.4038084997. The cubic root of 238529609 is about 620.1747764287.

The spelling of 238529609 in words is "two hundred thirty-eight million, five hundred twenty-nine thousand, six hundred nine".