993944617 has 2 divisors, whose sum is σ = 993944618. Its totient is φ = 993944616.

The previous prime is 993944603. The next prime is 993944647. The reversal of 993944617 is 716449399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 908178496 + 85766121 = 30136^2 + 9261^2 .

It is an emirp because it is prime and its reverse (716449399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 993944617 - 2¹¹ = 993942569 is a prime.

It is not a weakly prime, because it can be changed into another prime (993944647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496972308 + 496972309.

It is an arithmetic number, because the mean of its divisors is an integer number (496972309).

Almost surely, 2^993944617 is an apocalyptic number.

It is an amenable number.

993944617 is a deficient number, since it is larger than the sum of its proper divisors (1).

993944617 is an equidigital number, since it uses as much as digits as its factorization.

993944617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 52.

The square root of 993944617 is about 31526.8872075884. The cubic root of 993944617 is about 997.9774510536.

The spelling of 993944617 in words is "nine hundred ninety-three million, nine hundred forty-four thousand, six hundred seventeen".