985551843 has 8 divisors (see below), whose sum is σ = 1333682368. Its totient is φ = 647227944.

The previous prime is 985551803. The next prime is 985551851. The reversal of 985551843 is 348155589.

It is a happy number.

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

It is not a de Polignac number, because 985551843 - 2²⁵ = 951997411 is a prime.

It is the 31394-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 985551792 and 985551801.

It is not an unprimeable number, because it can be changed into a prime (985551803) by changing a digit.

It is a nontrivial repunit in base 31393.

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, 2451421 + ... + 2451822.

It is an arithmetic number, because the mean of its divisors is an integer number (166710296).

Almost surely, 2^985551843 is an apocalyptic number.

985551843 is a deficient number, since it is larger than the sum of its proper divisors (348130525).

985551843 is a wasteful number, since it uses less digits than its factorization.

985551843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4903313.

The product of its digits is 864000, while the sum is 48.

The square root of 985551843 is about 31393.5000119451. The cubic root of 985551843 is about 995.1605653187.

The spelling of 985551843 in words is "nine hundred eighty-five million, five hundred fifty-one thousand, eight hundred forty-three".