823278543 has 8 divisors (see below), whose sum is σ = 1097860656. Its totient is φ = 548774400.

The previous prime is 823278497. The next prime is 823278611. The reversal of 823278543 is 345872328.

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

It is not a de Polignac number, because 823278543 - 2²¹ = 821181391 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 823278495 and 823278504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823278943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12783 + ... + 42543.

It is an arithmetic number, because the mean of its divisors is an integer number (137232582).

Almost surely, 2^823278543 is an apocalyptic number.

823278543 is a deficient number, since it is larger than the sum of its proper divisors (274582113).

823278543 is a wasteful number, since it uses less digits than its factorization.

823278543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38985.

The product of its digits is 322560, while the sum is 42.

The square root of 823278543 is about 28692.8308641723. The cubic root of 823278543 is about 937.2359360108.

The spelling of 823278543 in words is "eight hundred twenty-three million, two hundred seventy-eight thousand, five hundred forty-three".