817208141 has 2 divisors, whose sum is σ = 817208142. Its totient is φ = 817208140.

The previous prime is 817208111. The next prime is 817208149. The reversal of 817208141 is 141802718.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 816759241 + 448900 = 28579^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 817208141 - 2¹⁴ = 817191757 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 817208098 and 817208107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (817208149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408604070 + 408604071.

It is an arithmetic number, because the mean of its divisors is an integer number (408604071).

Almost surely, 2^817208141 is an apocalyptic number.

It is an amenable number.

817208141 is a deficient number, since it is larger than the sum of its proper divisors (1).

817208141 is an equidigital number, since it uses as much as digits as its factorization.

817208141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 817208141 is about 28586.8525899582. The cubic root of 817208141 is about 934.9266973332.

The spelling of 817208141 in words is "eight hundred seventeen million, two hundred eight thousand, one hundred forty-one".