238138643 has 2 divisors, whose sum is σ = 238138644. Its totient is φ = 238138642.

The previous prime is 238138603. The next prime is 238138661. The reversal of 238138643 is 346831832.

238138643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238138643 - 2¹⁶ = 238073107 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 238138597 and 238138606.

It is not a weakly prime, because it can be changed into another prime (238138603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119069321 + 119069322.

It is an arithmetic number, because the mean of its divisors is an integer number (119069322).

Almost surely, 2^238138643 is an apocalyptic number.

238138643 is a deficient number, since it is larger than the sum of its proper divisors (1).

238138643 is an equidigital number, since it uses as much as digits as its factorization.

238138643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The square root of 238138643 is about 15431.7414117785. The cubic root of 238138643 is about 619.8357551408.

The spelling of 238138643 in words is "two hundred thirty-eight million, one hundred thirty-eight thousand, six hundred forty-three".