850417 has 2 divisors, whose sum is σ = 850418. Its totient is φ = 850416.

The previous prime is 850403. The next prime is 850427. The reversal of 850417 is 714058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461041 + 389376 = 679^2 + 624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-850417 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 850391 and 850400.

It is not a weakly prime, because it can be changed into another prime (850427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425208 + 425209.

It is an arithmetic number, because the mean of its divisors is an integer number (425209).

2⁸⁵⁰⁴¹⁷ is an apocalyptic number.

It is an amenable number.

850417 is a deficient number, since it is larger than the sum of its proper divisors (1).

850417 is an equidigital number, since it uses as much as digits as its factorization.

850417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 850417 is about 922.1805680017. The cubic root of 850417 is about 94.7423118079.

The spelling of 850417 in words is "eight hundred fifty thousand, four hundred seventeen".