998336641 has 2 divisors, whose sum is σ = 998336642. Its totient is φ = 998336640.

The previous prime is 998336623. The next prime is 998336663. The reversal of 998336641 is 146633899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532640241 + 465696400 = 23079^2 + 21580^2 .

It is an emirp because it is prime and its reverse (146633899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998336641 - 2¹⁹ = 997812353 is a prime.

It is not a weakly prime, because it can be changed into another prime (998306641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499168320 + 499168321.

It is an arithmetic number, because the mean of its divisors is an integer number (499168321).

Almost surely, 2^998336641 is an apocalyptic number.

It is an amenable number.

998336641 is a deficient number, since it is larger than the sum of its proper divisors (1).

998336641 is an equidigital number, since it uses as much as digits as its factorization.

998336641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The square root of 998336641 is about 31596.4656409542. The cubic root of 998336641 is about 999.4452392975.

The spelling of 998336641 in words is "nine hundred ninety-eight million, three hundred thirty-six thousand, six hundred forty-one".