998193017 has 2 divisors, whose sum is σ = 998193018. Its totient is φ = 998193016.

The previous prime is 998192981. The next prime is 998193019. The reversal of 998193017 is 710391899.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976187536 + 22005481 = 31244^2 + 4691^2 .

It is a cyclic number.

It is not a de Polignac number, because 998193017 - 2²⁰ = 997144441 is a prime.

Together with 998193019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998193019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499096508 + 499096509.

It is an arithmetic number, because the mean of its divisors is an integer number (499096509).

Almost surely, 2^998193017 is an apocalyptic number.

It is an amenable number.

998193017 is a deficient number, since it is larger than the sum of its proper divisors (1).

998193017 is an equidigital number, since it uses as much as digits as its factorization.

998193017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 998193017 is about 31594.1927733563. The cubic root of 998193017 is about 999.3973091701.

The spelling of 998193017 in words is "nine hundred ninety-eight million, one hundred ninety-three thousand, seventeen".