238012409 has 4 divisors (see below), whose sum is σ = 238452900. Its totient is φ = 237571920.

The previous prime is 238012387. The next prime is 238012447. The reversal of 238012409 is 904210832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44023225 + 193989184 = 6635^2 + 13928^2 .

It is a cyclic number.

It is not a de Polignac number, because 238012409 - 2²⁴ = 221235193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238012469) 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 3 ways as a sum of consecutive naturals, for example, 219434 + ... + 220515.

It is an arithmetic number, because the mean of its divisors is an integer number (59613225).

Almost surely, 2^238012409 is an apocalyptic number.

It is an amenable number.

238012409 is a deficient number, since it is larger than the sum of its proper divisors (440491).

238012409 is an equidigital number, since it uses as much as digits as its factorization.

238012409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440490.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 238012409 is about 15427.6507932997. The cubic root of 238012409 is about 619.7262136636.

The spelling of 238012409 in words is "two hundred thirty-eight million, twelve thousand, four hundred nine".