993411217 has 2 divisors, whose sum is σ = 993411218. Its totient is φ = 993411216.

The previous prime is 993411191. The next prime is 993411233. The reversal of 993411217 is 712114399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990927441 + 2483776 = 31479^2 + 1576^2 .

It is a cyclic number.

It is not a de Polignac number, because 993411217 - 2²³ = 985022609 is a prime.

It is a super-2 number, since 2×993411217² = 1973731692122842178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (993411817) 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, 496705608 + 496705609.

It is an arithmetic number, because the mean of its divisors is an integer number (496705609).

Almost surely, 2^993411217 is an apocalyptic number.

It is an amenable number.

993411217 is a deficient number, since it is larger than the sum of its proper divisors (1).

993411217 is an equidigital number, since it uses as much as digits as its factorization.

993411217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 993411217 is about 31518.4266263403. The cubic root of 993411217 is about 997.7988977034.

The spelling of 993411217 in words is "nine hundred ninety-three million, four hundred eleven thousand, two hundred seventeen".