981813242 has 16 divisors (see below), whose sum is σ = 1489304040. Its totient is φ = 485388288.

The previous prime is 981813199. The next prime is 981813247. The reversal of 981813242 is 242318189.

It can be written as a sum of positive squares in 4 ways, for example, as 832264801 + 149548441 = 28849^2 + 12229^2 .

It is a junction number, because it is equal to n+sod(n) for n = 981813196 and 981813205.

It is not an unprimeable number, because it can be changed into a prime (981813247) 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 7 ways as a sum of consecutive naturals, for example, 308234 + ... + 311402.

Almost surely, 2^981813242 is an apocalyptic number.

981813242 is a deficient number, since it is larger than the sum of its proper divisors (507490798).

981813242 is a wasteful number, since it uses less digits than its factorization.

981813242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4865.

The product of its digits is 27648, while the sum is 38.

The square root of 981813242 is about 31333.8992466626. The cubic root of 981813242 is about 993.9006205408.

The spelling of 981813242 in words is "nine hundred eighty-one million, eight hundred thirteen thousand, two hundred forty-two".