985402543 has 2 divisors, whose sum is σ = 985402544. Its totient is φ = 985402542.

The previous prime is 985402541. The next prime is 985402559. The reversal of 985402543 is 345204589.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 985402543 - 2¹ = 985402541 is a prime.

Together with 985402541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 985402496 and 985402505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985402541) 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 as a sum of consecutive naturals, namely, 492701271 + 492701272.

It is an arithmetic number, because the mean of its divisors is an integer number (492701272).

Almost surely, 2^985402543 is an apocalyptic number.

985402543 is a deficient number, since it is larger than the sum of its proper divisors (1).

985402543 is an equidigital number, since it uses as much as digits as its factorization.

985402543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 985402543 is about 31391.1220411122. The cubic root of 985402543 is about 995.1103109099.

The spelling of 985402543 in words is "nine hundred eighty-five million, four hundred two thousand, five hundred forty-three".