238242817 has 4 divisors (see below), whose sum is σ = 239820736. Its totient is φ = 236664900.

The previous prime is 238242793. The next prime is 238242839. The reversal of 238242817 is 718242832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238242817 - 2⁷ = 238242689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238242857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788733 + ... + 789034.

It is an arithmetic number, because the mean of its divisors is an integer number (59955184).

Almost surely, 2^238242817 is an apocalyptic number.

It is an amenable number.

238242817 is a deficient number, since it is larger than the sum of its proper divisors (1577919).

238242817 is a wasteful number, since it uses less digits than its factorization.

238242817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577918.

The product of its digits is 43008, while the sum is 37.

The square root of 238242817 is about 15435.1163584859. The cubic root of 238242817 is about 619.9261245658.

The spelling of 238242817 in words is "two hundred thirty-eight million, two hundred forty-two thousand, eight hundred seventeen".