823423783 has 12 divisors (see below), whose sum is σ = 1031542680. Its totient is φ = 651499632.

The previous prime is 823423751. The next prime is 823423819. The reversal of 823423783 is 387324328.

It is not a de Polignac number, because 823423783 - 2⁵ = 823423751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823423723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 645693 + ... + 646966.

It is an arithmetic number, because the mean of its divisors is an integer number (85961890).

Almost surely, 2^823423783 is an apocalyptic number.

823423783 is a deficient number, since it is larger than the sum of its proper divisors (208118897).

823423783 is a wasteful number, since it uses less digits than its factorization.

823423783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292686 (or 1292679 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 823423783 is about 28695.3616983651. The cubic root of 823423783 is about 937.2910474286.

The spelling of 823423783 in words is "eight hundred twenty-three million, four hundred twenty-three thousand, seven hundred eighty-three".