73945729 has 16 divisors (see below), whose sum is σ = 87171840. Its totient is φ = 61839360.

The previous prime is 73945691. The next prime is 73945747. The reversal of 73945729 is 92754937.

It is not a de Polignac number, because 73945729 - 2⁷ = 73945601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73945829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51777 + ... + 53185.

It is an arithmetic number, because the mean of its divisors is an integer number (5448240).

Almost surely, 2^73945729 is an apocalyptic number.

It is an amenable number.

73945729 is a deficient number, since it is larger than the sum of its proper divisors (13226111).

73945729 is a wasteful number, since it uses less digits than its factorization.

73945729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800.

The product of its digits is 476280, while the sum is 46.

The square root of 73945729 is about 8599.1702506695. The cubic root of 73945729 is about 419.7309860831.

The spelling of 73945729 in words is "seventy-three million, nine hundred forty-five thousand, seven hundred twenty-nine".