438234217 has 2 divisors, whose sum is σ = 438234218. Its totient is φ = 438234216.

The previous prime is 438234193. The next prime is 438234271. The reversal of 438234217 is 712432834.

Together with next prime (438234271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437479056 + 755161 = 20916^2 + 869^2 .

It is a cyclic number.

It is not a de Polignac number, because 438234217 - 2²³ = 429845609 is a prime.

It is not a weakly prime, because it can be changed into another prime (438231217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219117108 + 219117109.

It is an arithmetic number, because the mean of its divisors is an integer number (219117109).

Almost surely, 2^438234217 is an apocalyptic number.

It is an amenable number.

438234217 is a deficient number, since it is larger than the sum of its proper divisors (1).

438234217 is an equidigital number, since it uses as much as digits as its factorization.

438234217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 34.

The square root of 438234217 is about 20934.0444491742. The cubic root of 438234217 is about 759.5716751990.

The spelling of 438234217 in words is "four hundred thirty-eight million, two hundred thirty-four thousand, two hundred seventeen".