238917321 has 12 divisors (see below), whose sum is σ = 345237360. Its totient is φ = 159216120.

The previous prime is 238917319. The next prime is 238917347. The reversal of 238917321 is 123719832.

It is not a de Polignac number, because 238917321 - 2¹ = 238917319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (238917311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39390 + ... + 45048.

It is an arithmetic number, because the mean of its divisors is an integer number (28769780).

Almost surely, 2^238917321 is an apocalyptic number.

It is an amenable number.

238917321 is a deficient number, since it is larger than the sum of its proper divisors (106320039).

238917321 is a wasteful number, since it uses less digits than its factorization.

238917321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10356 (or 10353 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 238917321 is about 15456.9505724771. The cubic root of 238917321 is about 620.5106104077.

The spelling of 238917321 in words is "two hundred thirty-eight million, nine hundred seventeen thousand, three hundred twenty-one".