238904123 has 2 divisors, whose sum is σ = 238904124. Its totient is φ = 238904122.

The previous prime is 238904101. The next prime is 238904147. The reversal of 238904123 is 321409832.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238904123 - 2¹⁰ = 238903099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238904123.

It is not a weakly prime, because it can be changed into another prime (238901123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119452061 + 119452062.

It is an arithmetic number, because the mean of its divisors is an integer number (119452062).

Almost surely, 2^238904123 is an apocalyptic number.

238904123 is a deficient number, since it is larger than the sum of its proper divisors (1).

238904123 is an equidigital number, since it uses as much as digits as its factorization.

238904123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 238904123 is about 15456.5236389041. The cubic root of 238904123 is about 620.4991843492.

The spelling of 238904123 in words is "two hundred thirty-eight million, nine hundred four thousand, one hundred twenty-three".