998019481 has 4 divisors (see below), whose sum is σ = 1007900964. Its totient is φ = 988138000.

The previous prime is 998019431. The next prime is 998019553. The reversal of 998019481 is 184910899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184910899 = 7489 ⋅24691.

It can be written as a sum of positive squares in 2 ways, for example, as 712409481 + 285610000 = 26691^2 + 16900^2 .

It is a cyclic number.

It is not a de Polignac number, because 998019481 - 2¹⁵ = 997986713 is a prime.

It is a super-2 number, since 2×998019481² = 1992085768911018722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998019401) 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 in 3 ways as a sum of consecutive naturals, for example, 4940590 + ... + 4940791.

It is an arithmetic number, because the mean of its divisors is an integer number (251975241).

Almost surely, 2^998019481 is an apocalyptic number.

It is an amenable number.

998019481 is a deficient number, since it is larger than the sum of its proper divisors (9881483).

998019481 is a wasteful number, since it uses less digits than its factorization.

998019481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881482.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 998019481 is about 31591.4463264979. The cubic root of 998019481 is about 999.3393906914.

The spelling of 998019481 in words is "nine hundred ninety-eight million, nineteen thousand, four hundred eighty-one".