7273729 has 4 divisors (see below), whose sum is σ = 7302960. Its totient is φ = 7244500.

The previous prime is 7273723. The next prime is 7273759. The reversal of 7273729 is 9273727.

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 an emirpimes, since its reverse is a distinct semiprime: 9273727 = 419 ⋅22133.

It is a cyclic number.

It is not a de Polignac number, because 7273729 - 2⁷ = 7273601 is a prime.

It is a Duffinian number.

7273729 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7273723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14239 + ... + 14740.

It is an arithmetic number, because the mean of its divisors is an integer number (1825740).

Almost surely, 2^7273729 is an apocalyptic number.

It is an amenable number.

7273729 is a deficient number, since it is larger than the sum of its proper divisors (29231).

7273729 is a wasteful number, since it uses less digits than its factorization.

7273729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29230.

The product of its digits is 37044, while the sum is 37.

The square root of 7273729 is about 2696.9851686652. The cubic root of 7273729 is about 193.7547561788.

The spelling of 7273729 in words is "seven million, two hundred seventy-three thousand, seven hundred twenty-nine".