994732217 has 2 divisors, whose sum is σ = 994732218. Its totient is φ = 994732216.

The previous prime is 994732159. The next prime is 994732243. The reversal of 994732217 is 712237499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 974625961 + 20106256 = 31219^2 + 4484^2 .

It is an emirp because it is prime and its reverse (712237499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 994732217 - 2¹² = 994728121 is a prime.

It is not a weakly prime, because it can be changed into another prime (994737217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497366108 + 497366109.

It is an arithmetic number, because the mean of its divisors is an integer number (497366109).

Almost surely, 2^994732217 is an apocalyptic number.

It is an amenable number.

994732217 is a deficient number, since it is larger than the sum of its proper divisors (1).

994732217 is an equidigital number, since it uses as much as digits as its factorization.

994732217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 994732217 is about 31539.3756596417. The cubic root of 994732217 is about 998.2409799962.

The spelling of 994732217 in words is "nine hundred ninety-four million, seven hundred thirty-two thousand, two hundred seventeen".