998170841 has 2 divisors, whose sum is σ = 998170842. Its totient is φ = 998170840.

The previous prime is 998170801. The next prime is 998170843. The reversal of 998170841 is 148071899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521665600 + 476505241 = 22840^2 + 21829^2 .

It is an emirp because it is prime and its reverse (148071899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998170841 - 2¹⁴ = 998154457 is a prime.

Together with 998170843, 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 (998170843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499085420 + 499085421.

It is an arithmetic number, because the mean of its divisors is an integer number (499085421).

Almost surely, 2^998170841 is an apocalyptic number.

It is an amenable number.

998170841 is a deficient number, since it is larger than the sum of its proper divisors (1).

998170841 is an equidigital number, since it uses as much as digits as its factorization.

998170841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 998170841 is about 31593.8418208359. The cubic root of 998170841 is about 999.3899081970.

The spelling of 998170841 in words is "nine hundred ninety-eight million, one hundred seventy thousand, eight hundred forty-one".