238400047 has 2 divisors, whose sum is σ = 238400048. Its totient is φ = 238400046.

The previous prime is 238400033. The next prime is 238400059. The reversal of 238400047 is 740004832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238400047 - 2¹⁵ = 238367279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 238399988 and 238400024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238400347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119200023 + 119200024.

It is an arithmetic number, because the mean of its divisors is an integer number (119200024).

Almost surely, 2^238400047 is an apocalyptic number.

238400047 is a deficient number, since it is larger than the sum of its proper divisors (1).

238400047 is an equidigital number, since it uses as much as digits as its factorization.

238400047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 238400047 is about 15440.2087744952. The cubic root of 238400047 is about 620.0624694253.

Adding to 238400047 its reverse (740004832), we get a palindrome (978404879).

The spelling of 238400047 in words is "two hundred thirty-eight million, four hundred thousand, forty-seven".