7073729 has 4 divisors (see below), whose sum is σ = 7617876. Its totient is φ = 6529584.

The previous prime is 7073707. The next prime is 7073741. The reversal of 7073729 is 9273707.

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 2002225 + 5071504 = 1415^2 + 2252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7073729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7073789) 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, 272054 + ... + 272079.

It is an arithmetic number, because the mean of its divisors is an integer number (1904469).

Almost surely, 2^7073729 is an apocalyptic number.

It is an amenable number.

7073729 is a deficient number, since it is larger than the sum of its proper divisors (544147).

7073729 is a wasteful number, since it uses less digits than its factorization.

7073729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544146.

The product of its (nonzero) digits is 18522, while the sum is 35.

The square root of 7073729 is about 2659.6482850182. The cubic root of 7073729 is about 191.9623859331.

The spelling of 7073729 in words is "seven million, seventy-three thousand, seven hundred twenty-nine".