8537821823 has 4 divisors (see below), whose sum is σ = 8538369408. Its totient is φ = 8537274240.

The previous prime is 8537821819. The next prime is 8537821841. The reversal of 8537821823 is 3281287358.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8537821823 - 2² = 8537821819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8537821883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249698 + ... + 281823.

It is an arithmetic number, because the mean of its divisors is an integer number (2134592352).

Almost surely, 2^8537821823 is an apocalyptic number.

8537821823 is a deficient number, since it is larger than the sum of its proper divisors (547585).

8537821823 is a wasteful number, since it uses less digits than its factorization.

8537821823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547584.

The product of its digits is 645120, while the sum is 47.

The square root of 8537821823 is about 92400.3345394377. The cubic root of 8537821823 is about 2043.8500456619.

The spelling of 8537821823 in words is "eight billion, five hundred thirty-seven million, eight hundred twenty-one thousand, eight hundred twenty-three".