8041729 has 4 divisors (see below), whose sum is σ = 8319060. Its totient is φ = 7764400.

The previous prime is 8041727. The next prime is 8041739. The reversal of 8041729 is 9271408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6656400 + 1385329 = 2580^2 + 1177^2 .

It is a cyclic number.

It is not a de Polignac number, because 8041729 - 2¹ = 8041727 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8041729.

It is not an unprimeable number, because it can be changed into a prime (8041723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138622 + ... + 138679.

It is an arithmetic number, because the mean of its divisors is an integer number (2079765).

Almost surely, 2^8041729 is an apocalyptic number.

It is an amenable number.

8041729 is a deficient number, since it is larger than the sum of its proper divisors (277331).

8041729 is a wasteful number, since it uses less digits than its factorization.

8041729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277330.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 8041729 is about 2835.7942450044. The cubic root of 8041729 is about 200.3471387914.

The spelling of 8041729 in words is "eight million, forty-one thousand, seven hundred twenty-nine".