238770766217 has 2 divisors, whose sum is σ = 238770766218. Its totient is φ = 238770766216.

The previous prime is 238770766183. The next prime is 238770766229. The reversal of 238770766217 is 712667077832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214328257936 + 24442508281 = 462956^2 + 156341^2 .

It is a cyclic number.

It is not a de Polignac number, because 238770766217 - 2¹⁶ = 238770700681 is a prime.

It is a super-2 number, since 2×238770766217² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238770765217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119385383108 + 119385383109.

It is an arithmetic number, because the mean of its divisors is an integer number (119385383109).

Almost surely, 2^238770766217 is an apocalyptic number.

It is an amenable number.

238770766217 is a deficient number, since it is larger than the sum of its proper divisors (1).

238770766217 is an equidigital number, since it uses as much as digits as its factorization.

238770766217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8297856, while the sum is 56.

The spelling of 238770766217 in words is "two hundred thirty-eight billion, seven hundred seventy million, seven hundred sixty-six thousand, two hundred seventeen".