238637089 has 2 divisors, whose sum is σ = 238637090. Its totient is φ = 238637088.

The previous prime is 238637033. The next prime is 238637137. The reversal of 238637089 is 980736832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195077089 + 43560000 = 13967^2 + 6600^2 .

It is a cyclic number.

It is not a de Polignac number, because 238637089 - 2⁷ = 238636961 is a prime.

It is not a weakly prime, because it can be changed into another prime (238637989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119318544 + 119318545.

It is an arithmetic number, because the mean of its divisors is an integer number (119318545).

Almost surely, 2^238637089 is an apocalyptic number.

It is an amenable number.

238637089 is a deficient number, since it is larger than the sum of its proper divisors (1).

238637089 is an equidigital number, since it uses as much as digits as its factorization.

238637089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 238637089 is about 15447.8829941193. The cubic root of 238637089 is about 620.2679114433.

The spelling of 238637089 in words is "two hundred thirty-eight million, six hundred thirty-seven thousand, eighty-nine".