823134732143 has 4 divisors (see below), whose sum is σ = 823689780648. Its totient is φ = 822579683640.

The previous prime is 823134732137. The next prime is 823134732169. The reversal of 823134732143 is 341237431328.

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 823134732143 - 2¹² = 823134728047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 823134732143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823134731143) 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, 277522028 + ... + 277524993.

It is an arithmetic number, because the mean of its divisors is an integer number (205922445162).

Almost surely, 2^823134732143 is an apocalyptic number.

823134732143 is a deficient number, since it is larger than the sum of its proper divisors (555048505).

823134732143 is a wasteful number, since it uses less digits than its factorization.

823134732143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555048504.

The product of its digits is 290304, while the sum is 41.

The spelling of 823134732143 in words is "eight hundred twenty-three billion, one hundred thirty-four million, seven hundred thirty-two thousand, one hundred forty-three".