981355243 has 8 divisors (see below), whose sum is σ = 1133544240. Its totient is φ = 839662080.

The previous prime is 981355229. The next prime is 981355259. The reversal of 981355243 is 342553189.

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 981355243 - 2¹³ = 981347051 is a prime.

It is a super-2 number, since 2×981355243² = 1926116225927178098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 981355196 and 981355205.

It is not an unprimeable number, because it can be changed into a prime (981355223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2623758 + ... + 2624131.

It is an arithmetic number, because the mean of its divisors is an integer number (141693030).

Almost surely, 2^981355243 is an apocalyptic number.

981355243 is a deficient number, since it is larger than the sum of its proper divisors (152188997).

981355243 is a wasteful number, since it uses less digits than its factorization.

981355243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247917.

The product of its digits is 129600, while the sum is 40.

The square root of 981355243 is about 31326.5900314733. The cubic root of 981355243 is about 993.7460506521.

It can be divided in two parts, 9813 and 55243, that added together give a palindrome (65056).

The spelling of 981355243 in words is "nine hundred eighty-one million, three hundred fifty-five thousand, two hundred forty-three".