73061729 has 8 divisors (see below), whose sum is σ = 78863400. Its totient is φ = 67286016.

The previous prime is 73061693. The next prime is 73061749. The reversal of 73061729 is 92716037.

It can be written as a sum of positive squares in 4 ways, for example, as 18079504 + 54982225 = 4252^2 + 7415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73061729 - 2⁸ = 73061473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73061749) 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 7 ways as a sum of consecutive naturals, for example, 422 + ... + 12095.

It is an arithmetic number, because the mean of its divisors is an integer number (9857925).

Almost surely, 2^73061729 is an apocalyptic number.

It is an amenable number.

73061729 is a deficient number, since it is larger than the sum of its proper divisors (5801671).

73061729 is a wasteful number, since it uses less digits than its factorization.

73061729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12979.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 73061729 is about 8547.6153984606. The cubic root of 73061729 is about 418.0516884716.

The spelling of 73061729 in words is "seventy-three million, sixty-one thousand, seven hundred twenty-nine".