981343543 has 2 divisors, whose sum is σ = 981343544. Its totient is φ = 981343542.

The previous prime is 981343523. The next prime is 981343567. The reversal of 981343543 is 345343189.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (345343189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981343543 - 2⁹ = 981343031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981343496 and 981343505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981343523) 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 as a sum of consecutive naturals, namely, 490671771 + 490671772.

It is an arithmetic number, because the mean of its divisors is an integer number (490671772).

Almost surely, 2^981343543 is an apocalyptic number.

981343543 is a deficient number, since it is larger than the sum of its proper divisors (1).

981343543 is an equidigital number, since it uses as much as digits as its factorization.

981343543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 981343543 is about 31326.4032885999. The cubic root of 981343543 is about 993.7421013942.

The spelling of 981343543 in words is "nine hundred eighty-one million, three hundred forty-three thousand, five hundred forty-three".