8729823 has 12 divisors (see below), whose sum is σ = 12365960. Its totient is φ = 5476992.

The previous prime is 8729821. The next prime is 8729837. The reversal of 8729823 is 3289278.

It is not a de Polignac number, because 8729823 - 2¹ = 8729821 is a prime.

It is a super-2 number, since 2×8729823² = 152419619222658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8729821) 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 11 ways as a sum of consecutive naturals, for example, 4168 + ... + 5901.

Almost surely, 2^8729823 is an apocalyptic number.

8729823 is a deficient number, since it is larger than the sum of its proper divisors (3636137).

8729823 is a wasteful number, since it uses less digits than its factorization.

8729823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106 (or 10089 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 8729823 is about 2954.6273876751. The cubic root of 8729823 is about 205.9057522808.

The spelling of 8729823 in words is "eight million, seven hundred twenty-nine thousand, eight hundred twenty-three".