823989573 has 24 divisors (see below), whose sum is σ = 1299542400. Its totient is φ = 498951360.

The previous prime is 823989503. The next prime is 823989581. The reversal of 823989573 is 375989328.

It is a happy number.

It is not a de Polignac number, because 823989573 - 2⁸ = 823989317 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823989503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137953 + ... + 143801.

It is an arithmetic number, because the mean of its divisors is an integer number (54147600).

Almost surely, 2^823989573 is an apocalyptic number.

It is an amenable number.

823989573 is a deficient number, since it is larger than the sum of its proper divisors (475552827).

823989573 is a wasteful number, since it uses less digits than its factorization.

823989573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7289 (or 7286 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 823989573 is about 28705.2185673616. The cubic root of 823989573 is about 937.5056750590.

The spelling of 823989573 in words is "eight hundred twenty-three million, nine hundred eighty-nine thousand, five hundred seventy-three".