998781713 has 2 divisors, whose sum is σ = 998781714. Its totient is φ = 998781712.

The previous prime is 998781703. The next prime is 998781733. The reversal of 998781713 is 317187899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 788879569 + 209902144 = 28087^2 + 14488^2 .

It is a cyclic number.

It is not a de Polignac number, because 998781713 - 2⁸ = 998781457 is a prime.

It is not a weakly prime, because it can be changed into another prime (998781703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499390856 + 499390857.

It is an arithmetic number, because the mean of its divisors is an integer number (499390857).

Almost surely, 2^998781713 is an apocalyptic number.

It is an amenable number.

998781713 is a deficient number, since it is larger than the sum of its proper divisors (1).

998781713 is an equidigital number, since it uses as much as digits as its factorization.

998781713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 53.

The square root of 998781713 is about 31603.5079223810. The cubic root of 998781713 is about 999.5937393079.

The spelling of 998781713 in words is "nine hundred ninety-eight million, seven hundred eighty-one thousand, seven hundred thirteen".