238428193 has 2 divisors, whose sum is σ = 238428194. Its totient is φ = 238428192.

The previous prime is 238428191. The next prime is 238428217. The reversal of 238428193 is 391824832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231283264 + 7144929 = 15208^2 + 2673^2 .

It is a cyclic number.

It is not a de Polignac number, because 238428193 - 2¹ = 238428191 is a prime.

Together with 238428191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (238428191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119214096 + 119214097.

It is an arithmetic number, because the mean of its divisors is an integer number (119214097).

Almost surely, 2^238428193 is an apocalyptic number.

It is an amenable number.

238428193 is a deficient number, since it is larger than the sum of its proper divisors (1).

238428193 is an equidigital number, since it uses as much as digits as its factorization.

238428193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 238428193 is about 15441.1201990011. The cubic root of 238428193 is about 620.0868704153.

The spelling of 238428193 in words is "two hundred thirty-eight million, four hundred twenty-eight thousand, one hundred ninety-three".