981913243 has 8 divisors (see below), whose sum is σ = 987791760. Its totient is φ = 976048800.

The previous prime is 981913241. The next prime is 981913253. The reversal of 981913243 is 342319189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981913243 - 2¹ = 981913241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 981913196 and 981913205.

It is not an unprimeable number, because it can be changed into a prime (981913241) 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, 157893 + ... + 163993.

It is an arithmetic number, because the mean of its divisors is an integer number (123473970).

Almost surely, 2^981913243 is an apocalyptic number.

981913243 is a deficient number, since it is larger than the sum of its proper divisors (5878517).

981913243 is a wasteful number, since it uses less digits than its factorization.

981913243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037.

The product of its digits is 46656, while the sum is 40.

The square root of 981913243 is about 31335.4949378496. The cubic root of 981913243 is about 993.9343634420.

The spelling of 981913243 in words is "nine hundred eighty-one million, nine hundred thirteen thousand, two hundred forty-three".