8379729 has 12 divisors (see below), whose sum is σ = 12129156. Its totient is φ = 5574912.

The previous prime is 8379719. The next prime is 8379731. The reversal of 8379729 is 9279738.

8379729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5992704 + 2387025 = 2448^2 + 1545^2 .

It is not a de Polignac number, because 8379729 - 2⁴ = 8379713 is a prime.

It is a super-2 number, since 2×8379729² = 140439716226882, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8379719) 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, 8089 + ... + 9065.

It is an arithmetic number, because the mean of its divisors is an integer number (1010763).

Almost surely, 2^8379729 is an apocalyptic number.

It is an amenable number.

8379729 is a deficient number, since it is larger than the sum of its proper divisors (3749427).

8379729 is a wasteful number, since it uses less digits than its factorization.

8379729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936 (or 1933 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 8379729 is about 2894.7761571493. The cubic root of 8379729 is about 203.1156208371.

Subtracting 8379729 from its reverse (9279738), we obtain a palindrome (900009).

The spelling of 8379729 in words is "eight million, three hundred seventy-nine thousand, seven hundred twenty-nine".