8272729 has 4 divisors (see below), whose sum is σ = 8299984. Its totient is φ = 8245476.

The previous prime is 8272723. The next prime is 8272751. The reversal of 8272729 is 9272728.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8272729 - 2³ = 8272721 is a prime.

It is a Duffinian number.

8272729 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8272721) 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, 13167 + ... + 13780.

It is an arithmetic number, because the mean of its divisors is an integer number (2074996).

Almost surely, 2^8272729 is an apocalyptic number.

It is an amenable number.

8272729 is a deficient number, since it is larger than the sum of its proper divisors (27255).

8272729 is a wasteful number, since it uses less digits than its factorization.

8272729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27254.

The product of its digits is 28224, while the sum is 37.

The square root of 8272729 is about 2876.2352129129. The cubic root of 8272729 is about 202.2473931935.

Subtracting 8272729 from its reverse (9272728), we obtain a palindrome (999999).

The spelling of 8272729 in words is "eight million, two hundred seventy-two thousand, seven hundred twenty-nine".