993217 has 2 divisors, whose sum is σ = 993218. Its totient is φ = 993216.

The previous prime is 993211. The next prime is 993233. The reversal of 993217 is 712399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923521 + 69696 = 961^2 + 264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993217 is a prime.

It is an Ulam number.

993217 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (993211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496608 + 496609.

It is an arithmetic number, because the mean of its divisors is an integer number (496609).

2⁹⁹³²¹⁷ is an apocalyptic number.

It is an amenable number.

993217 is a deficient number, since it is larger than the sum of its proper divisors (1).

993217 is an equidigital number, since it uses as much as digits as its factorization.

993217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 31.

The square root of 993217 is about 996.6027292758. The cubic root of 993217 is about 99.7733868527.

The spelling of 993217 in words is "nine hundred ninety-three thousand, two hundred seventeen".