993206917 has 2 divisors, whose sum is σ = 993206918. Its totient is φ = 993206916.

The previous prime is 993206899. The next prime is 993206927. The reversal of 993206917 is 719602399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976812516 + 16394401 = 31254^2 + 4049^2 .

It is an emirp because it is prime and its reverse (719602399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 993206917 - 2⁷ = 993206789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993206927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496603458 + 496603459.

It is an arithmetic number, because the mean of its divisors is an integer number (496603459).

Almost surely, 2^993206917 is an apocalyptic number.

It is an amenable number.

993206917 is a deficient number, since it is larger than the sum of its proper divisors (1).

993206917 is an equidigital number, since it uses as much as digits as its factorization.

993206917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 993206917 is about 31515.1854984228. The cubic root of 993206917 is about 997.7304922310.

The spelling of 993206917 in words is "nine hundred ninety-three million, two hundred six thousand, nine hundred seventeen".