8713729 has 4 divisors (see below), whose sum is σ = 8720320. Its totient is φ = 8707140.

The previous prime is 8713721. The next prime is 8713763. The reversal of 8713729 is 9273178.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8713729 - 2³ = 8713721 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8713721) 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, 549 + ... + 4210.

It is an arithmetic number, because the mean of its divisors is an integer number (2180080).

Almost surely, 2^8713729 is an apocalyptic number.

It is an amenable number.

8713729 is a deficient number, since it is larger than the sum of its proper divisors (6591).

8713729 is a wasteful number, since it uses less digits than its factorization.

8713729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6590.

The product of its digits is 21168, while the sum is 37.

The square root of 8713729 is about 2951.9026067945. The cubic root of 8713729 is about 205.7791408670.

The spelling of 8713729 in words is "eight million, seven hundred thirteen thousand, seven hundred twenty-nine".