238018769 has 2 divisors, whose sum is σ = 238018770. Its totient is φ = 238018768.

The previous prime is 238018741. The next prime is 238018771. The reversal of 238018769 is 967810832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233692369 + 4326400 = 15287^2 + 2080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238018769 is a prime.

It is a super-2 number, since 2×238018769² = 113305868792550722, which contains 22 as substring.

Together with 238018771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (238018069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119009384 + 119009385.

It is an arithmetic number, because the mean of its divisors is an integer number (119009385).

Almost surely, 2^238018769 is an apocalyptic number.

It is an amenable number.

238018769 is a deficient number, since it is larger than the sum of its proper divisors (1).

238018769 is an equidigital number, since it uses as much as digits as its factorization.

238018769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 238018769 is about 15427.8569153334. The cubic root of 238018769 is about 619.7317335769.

The spelling of 238018769 in words is "two hundred thirty-eight million, eighteen thousand, seven hundred sixty-nine".