238278541 has 2 divisors, whose sum is σ = 238278542. Its totient is φ = 238278540.

The previous prime is 238278539. The next prime is 238278577. The reversal of 238278541 is 145872832.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154629225 + 83649316 = 12435^2 + 9146^2 .

It is a cyclic number.

It is not a de Polignac number, because 238278541 - 2¹ = 238278539 is a prime.

Together with 238278539, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 238278494 and 238278503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238278941) 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, 119139270 + 119139271.

It is an arithmetic number, because the mean of its divisors is an integer number (119139271).

Almost surely, 2^238278541 is an apocalyptic number.

It is an amenable number.

238278541 is a deficient number, since it is larger than the sum of its proper divisors (1).

238278541 is an equidigital number, since it uses as much as digits as its factorization.

238278541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

The square root of 238278541 is about 15436.2735464230. The cubic root of 238278541 is about 619.9571085486.

The spelling of 238278541 in words is "two hundred thirty-eight million, two hundred seventy-eight thousand, five hundred forty-one".