998885749 has 2 divisors, whose sum is σ = 998885750. Its totient is φ = 998885748.

The previous prime is 998885737. The next prime is 998885801. The reversal of 998885749 is 947588899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 907816900 + 91068849 = 30130^2 + 9543^2 .

It is an emirp because it is prime and its reverse (947588899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998885749 - 2¹⁷ = 998754677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998885149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499442874 + 499442875.

It is an arithmetic number, because the mean of its divisors is an integer number (499442875).

Almost surely, 2^998885749 is an apocalyptic number.

It is an amenable number.

998885749 is a deficient number, since it is larger than the sum of its proper divisors (1).

998885749 is an equidigital number, since it uses as much as digits as its factorization.

998885749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 67.

The square root of 998885749 is about 31605.1538360439. The cubic root of 998885749 is about 999.6284449640.

The spelling of 998885749 in words is "nine hundred ninety-eight million, eight hundred eighty-five thousand, seven hundred forty-nine".