238138734209 has 8 divisors (see below), whose sum is σ = 243982424448. Its totient is φ = 232364200320.

The previous prime is 238138734187. The next prime is 238138734217. The reversal of 238138734209 is 902437831832.

It is a happy number.

238138734209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238138734209 - 2³⁶ = 169419257473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (238138734409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17282117 + ... + 17295890.

It is an arithmetic number, because the mean of its divisors is an integer number (30497803056).

Almost surely, 2^238138734209 is an apocalyptic number.

It is an amenable number.

238138734209 is a deficient number, since it is larger than the sum of its proper divisors (5843690239).

238138734209 is an equidigital number, since it uses as much as digits as its factorization.

238138734209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34578175.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 238138734209 in words is "two hundred thirty-eight billion, one hundred thirty-eight million, seven hundred thirty-four thousand, two hundred nine".