238920191 has 8 divisors (see below), whose sum is σ = 244265520. Its totient is φ = 233627328.

The previous prime is 238920179. The next prime is 238920229. The reversal of 238920191 is 191029832.

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 238920191 - 2²⁶ = 171811327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238920391) 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, 3836 + ... + 22193.

It is an arithmetic number, because the mean of its divisors is an integer number (30533190).

Almost surely, 2^238920191 is an apocalyptic number.

238920191 is a deficient number, since it is larger than the sum of its proper divisors (5345329).

238920191 is a wasteful number, since it uses less digits than its factorization.

238920191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26233.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 238920191 is about 15457.0434106915. The cubic root of 238920191 is about 620.5130950305.

The spelling of 238920191 in words is "two hundred thirty-eight million, nine hundred twenty thousand, one hundred ninety-one".