238742123 has 8 divisors (see below), whose sum is σ = 249523680. Its totient is φ = 228130560.

The previous prime is 238742117. The next prime is 238742131. The reversal of 238742123 is 321247832.

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 238742123 - 2¹⁶ = 238676587 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 238742123.

It is not an unprimeable number, because it can be changed into a prime (238742183) 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 in 7 ways as a sum of consecutive naturals, for example, 39623 + ... + 45248.

It is an arithmetic number, because the mean of its divisors is an integer number (31190460).

Almost surely, 2^238742123 is an apocalyptic number.

238742123 is a deficient number, since it is larger than the sum of its proper divisors (10781557).

238742123 is an equidigital number, since it uses as much as digits as its factorization.

238742123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84997.

The product of its digits is 16128, while the sum is 32.

The square root of 238742123 is about 15451.2822445259. The cubic root of 238742123 is about 620.3588999035.

Adding to 238742123 its reverse (321247832), we get a palindrome (559989955).

The spelling of 238742123 in words is "two hundred thirty-eight million, seven hundred forty-two thousand, one hundred twenty-three".