998832217 has 2 divisors, whose sum is σ = 998832218. Its totient is φ = 998832216.

The previous prime is 998832113. The next prime is 998832221. The reversal of 998832217 is 712238899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 735711376 + 263120841 = 27124^2 + 16221^2 .

It is an emirp because it is prime and its reverse (712238899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998832217 is a prime.

It is not a weakly prime, because it can be changed into another prime (998832257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499416108 + 499416109.

It is an arithmetic number, because the mean of its divisors is an integer number (499416109).

Almost surely, 2^998832217 is an apocalyptic number.

It is an amenable number.

998832217 is a deficient number, since it is larger than the sum of its proper divisors (1).

998832217 is an equidigital number, since it uses as much as digits as its factorization.

998832217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 998832217 is about 31604.3069375046. The cubic root of 998832217 is about 999.6105873775.

The spelling of 998832217 in words is "nine hundred ninety-eight million, eight hundred thirty-two thousand, two hundred seventeen".